The ViewSonic VX2479-HD-PRO is a 24-inch monitor designed to deliver stunning visuals and smooth performance for gaming, work, or entertainment. Whether you’re streaming videos, editing documents, or playing your favorite games, this monitor ensures vibrant colors and sharp details. Featuring a Full HD resolution of 1920×1080 pixels, the ViewSonic VX2479 provides crystal-clear image quality. You can enjoy a high-definition viewing experience that brings your movies, games, and content to life. This monitor comes equipped with an IPS panel, which offers wide viewing angles and consistent color reproduction. Whether you’re looking at the screen from the side or straight on, the picture quality remains bright and accurate. The ViewSonic VX2479-HD-PRO also supports a 75Hz refresh rate, ensuring smooth and fluid visuals. This makes it ideal for fast-paced gaming and action-packed scenes, reducing motion blur and providing a more enjoyable experience. With multiple connectivity options, including HDMI and DisplayPort, the ViewSonic VX2479 offers easy connections to your PC, gaming console, or other devices. Switching between work and play is quick and hassle-free. Designed with a sleek, frameless design, this monitor adds a modern touch to any workspace or gaming setup. It is lightweight and easy to set up, making it perfect for both home and office use. In conclusion, the ViewSonic VX2479-HD-PRO offers a stunning blend of sharp visuals, vibrant colors, and smooth performance. Upgrade your setup with this versatile monitor and experience high-quality viewing for work and play. Specifications: Resolution : FHD Display : 24″ IPS Refresh Rate : 180Hz Response Time : 1ms
The MSI Pro MP245PG 24″ FHD Business Monitor is built for productivity, offering a perfect balance between clarity and comfort. With its 24-inch Full HD display, it delivers crisp visuals and sharp text for everyday tasks. Moreover, the slim bezels make it an excellent choice for multi-monitor setups. Because eye comfort is important, this business monitor includes TÜV-certified low blue light and flicker-free technology. As a result, you can work longer hours without strain. In addition, its adjustable stand allows tilt customization, helping you find the most comfortable viewing angle. The MSI Pro MP245PG 24″ FHD Business Monitor also ensures smooth visuals with its 100Hz refresh rate. Furthermore, AMD FreeSync support minimizes screen tearing, making presentations and light entertainment look more fluid. Therefore, it is suitable not only for work but also for casual gaming. Connectivity is another strong feature of this monitor. With HDMI, DisplayPort, and VGA ports, it easily supports multiple devices. Besides that, its built-in speakers provide clear audio, reducing the need for external accessories. Not only is it practical, but it also comes with VESA mount compatibility for flexible desk or wall installation. In short, the MSI Pro MP245PG 24″ FHD Business Monitor is a reliable solution for professionals who need performance, comfort, and versatility in one package. Specifications: Display : 24″ IPS Screen : 1920 x 1080 (FHD) Refresh Rate : 100Hz Response Rate : 1ms (MPRT) / 4ms (GtG)
The Samsung 85″ QLED Q8F 4K Vision AI Smart TV (2025) | QA85Q8FAAUXTW delivers a premium large-screen entertainment experience with advanced QLED display technology. It produces bright, sharp, and colorful images, so movies, sports, and games look highly immersive on the massive 85-inch screen. QLED technology uses Quantum Dot color enhancement to improve brightness and color accuracy. As a result, visuals appear more vibrant and balanced across both dark and bright scenes. This helps maintain consistent image quality in different lighting conditions. Vision AI enhances picture and sound in real time. It analyzes each scene and automatically adjusts brightness, sharpness, and color for optimal results. Therefore, the TV consistently delivers improved visuals without manual settings. In addition, AI upscaling enhances lower-resolution content closer to 4K quality for better clarity and detail. HDR support expands contrast and color depth, making images more dynamic and lifelike. Fast motion handling also improves clarity, which enhances sports and action content by reducing blur. The Smart TV platform provides access to streaming apps, gaming features, and smart home controls. It runs smoothly and allows quick switching between applications. In addition, the slim design with thin bezels gives the Samsung 85 QLED Q8F 4K Vision AI Smart TV (2025) | QA85Q8FAAUXTW a modern and premium look suitable for large living spaces. Overall, this Samsung QLED TV combines bright performance, AI optimization, and smart connectivity for an immersive home entertainment experience. Specifications: QLED technology delivers bright and colorful picture quality 85-inch 4K display provides immersive large-screen viewing Vision AI optimizes picture and sound automatically in real time HDR improves contrast, brightness, and color depth Smart TV platform supports apps, streaming, and smart features
The ASUS VG27AQ3A 27 inch QHD 180Hz Monitor is a 27-inch gaming display designed for smooth performance and clear image quality. It uses a Fast IPS panel that provides wide viewing angles and consistent colors for gaming and everyday use. It features a QHD (2560×1440) resolution, which delivers sharper detail than Full HD. Therefore, users get more screen space and clearer visuals for games, work, and media. The monitor supports a 180Hz refresh rate for smoother motion in fast-paced gameplay. In addition, it includes a 1ms response time to reduce motion blur during rapid actions. It also features ELMB Sync technology, which combines motion blur reduction with adaptive sync. As a result, it helps reduce screen tearing and improves overall visual clarity. Moreover, it supports adaptive sync for smoother frame synchronization with compatible GPUs. The monitor also includes built-in gaming presets and on-screen display controls for quick adjustments. Overall, the ASUS VG27AQ3A 27 inch QHD 180Hz Monitor is built for high-refresh gaming, responsive performance, and sharp visual output in a 27-inch QHD format. Specifications: 27-inch QHD (2560×1440) display 180Hz refresh rate 1ms response time Fast IPS panel technology ELMB Sync for reduced motion blur 90LM0940-B01970
Authentic UK layout keyboard replacement for MacBook Air 13″ (Model A2338, 2020)—featuring Apple’s Magic Keyboard with scissor-switch mechanism, backlighting, and precise OEM fit for reliable performance and typing comfort. Compatible With: MacBook Air 13-inch (2020, Model A2338) – includes both Intel (Core i3/i5/i7) and Apple M1 chip variants. Layout: UK English (QWERTY) with £ symbol, tall vertical Enter key, and standard UK key labeling—exactly matches Apple’s original UK regional keyboard. Keyboard Type: Apple’s Magic Keyboard with scissor-switch mechanism—delivering quiet, responsive keystrokes, 1mm key travel, and greater long-term reliability than Butterfly keyboards. Integrated Features: Backlit keys for dim environments, ambient light sensor compatibility, and factory-matched ribbon cable for seamless connection to the logic board. Precision Build: Engineered to OEM specifications for exact alignment, key spacing, and tactile feedback—ensures a flush, secure fit within the original top case. Installation Note: The keyboard is glued into the top case and requires complete disassembly for replacement. Professional tools and adhesive are needed for proper reinstallation. Recommended for skilled technicians only.
AOC 24G4E 24-inch 180Hz gaming monitor delivers fast and responsive performance for competitive gaming. It focuses on smooth motion, low latency, and clear visual quality for everyday gameplay. Additionally, it features a 23.8-inch Fast IPS panel with Full HD resolution (1920 × 1080). This panel provides sharp detail and wide viewing angles, so it ensures consistent image quality in games and general use. Moreover, it supports a 180Hz refresh rate with 1ms GtG and 0.5ms MPRT response time. As a result, it delivers smooth motion and reduces blur during fast-paced action. The monitor includes Adaptive Sync and G-SYNC compatibility. Therefore, it reduces screen tearing and stuttering for stable gameplay performance. In addition, it supports HDR10 and low input lag mode. These features improve contrast and responsiveness during gaming sessions. Furthermore, it offers a three-sided frameless design with HDMI 2.0 and DisplayPort 1.4 connectivity. This makes it suitable for modern gaming setups and multi-monitor use. AOC 24G4E 24-inch 180Hz gaming monitor provides smooth performance, fast response, and essential competitive gaming features. Check out other option here! Specifications: 23.8-inch Fast IPS panel with Full HD 1920 × 1080 resolution 180Hz refresh rate for ultra-smooth gameplay 1ms GtG and 0.5ms MPRT response time Adaptive Sync and G-SYNC compatible support HDR10 with low input lag mode for better responsiveness
DELL 7.6V 68Wh/8500mAh 4-Cell GJKNX Laptop Battery Compatible with Dell Latitude E5480 E5580 E5490 E5491 E5590 E5591 Precision 15 3520 M3530 Series Notebook 93FTF GD1JP DY9NT 5YHR4 451-BBZG About this item Dell Authentic OEM Parts. Item Model: GJKNX, Battery Type: Li-Polymer, Voltage: 7.6V, Capacity: 68Wh, Cell: 4 cell. Before purchasing, please open the back cover of the laptop to confirm the battery model and shape. Compatible Battery P/N: 68Wh GJKNX GD1JP 0GD1JP DY9NT 0DY9NT 5YHR4 451-BBZG FPT1C KCM82 MT31P. Compatible Laptop Models: for Dell Latitude 5280 5288 5290 5480 5488 5490 5580 5590 5495 5491 5591 5590 E5480 E5580 E5490 E5590 P72G001 P72G002 P72G003 P60F001 series, For Dell Precision 15 3520 3530 Series ( Only work with type 68Wh battery)
SanDisk 2TB Portable SSD - Up to 800MB/s, USB-C, USB 3.2 Gen 2, Updated Firmware - External Solid State Drive - SDSSDE30-2T00-G26 SanDisk 2TB Portable SSD – Up to 800MB/s, USB-C, USB 3.2 Gen 2, Updated Firmware – External Solid State Drive – SDSSDE30-2T00-G26 About this item Solid state performance with up to 800MB/s read speeds in a portable drive. (Based on internal testing; performance may be lower depending on host device, interface, usage conditions and other factors. 1MB=1,000,000 bytes.) Back up your content and memories on a storage solution that fits seamlessly into your mobile lifestyle. Take it with you on your adventures—up to two-meter drop protection means this durable drive can take a beating. (Based on internal testing.) Secure it to your belt loop or backpack for extra peace of mind thanks to the tough rubber hook. From SanDisk, a brand professional photographers trust to take on assignments.
Genuine-quality replacement A1989 battery testing flex cable—brand new and ready for professional MacBook Pro 15" (2018–2019) battery diagnostics and repairs. Genuine-quality replacement A1989 battery testing flex cable—brand new and ready for professional MacBook Pro 15″ (2018–2019) battery diagnostics and repairs. This is a brand-new A1989 Battery Testing Flex Cable, designed specifically for use in MacBook Pro 15-inch models from 2018 and 2019 (A1989) during battery replacement or diagnostic procedures. The flex cable connects the battery to the logic board’s test points, allowing technicians to verify battery health, voltage, and communication before final reassembly—ensuring safe and accurate repairs. Made with high-quality materials and precise engineering, this flex cable matches OEM specifications for fit, function, and reliability. It’s an essential tool for certified repair shops, independent technicians, and advanced DIYers performing battery servicing on T2-chip MacBook Pro models. Please note: This is not a full battery—it is the small flex cable used during battery testing and installation. Proper handling and ESD-safe practices are recommended during installation. Compatible with: MacBook Pro 15″ (2018, A1989) MacBook Pro 15″ (2019, A1989)
The ViewSonic VX2758A-2K-PRO-3 27″ 2K 240Hz Gaming Monitor delivers fast and smooth visuals for serious gaming. Its 2K resolution shows sharp detail and clean image quality. The 27-inch screen gives wide viewing space for full immersion. This helps you enjoy every game scene clearly. Moreover, the ViewSonic VX2758A-2K-PRO-3 27″ 2K 240Hz Gaming Monitor features a powerful 240 Hz refresh rate. This high refresh rate makes motion extremely smooth and fluid. Fast games look clean and responsive at all times. As a result, reaction time improves during competitive play. In addition, the monitor offers a very fast response time. This helps reduce ghosting and motion blur during quick action. Movements feel sharp and accurate on screen. This gives a clear advantage in fast-paced games. Furthermore, the ViewSonic VX2758A-2K-PRO-3 27″ 2K 240Hz Gaming Monitor uses an IPS panel for wide viewing angles. Colors stay accurate from different positions. Images remain bright and clear even from the side. This improves both gaming and content viewing. Also, the monitor supports adaptive sync technology. This helps reduce screen tearing and stuttering during gameplay. Frame changes stay smooth and stable. This keeps the gaming experience clean and enjoyable. In addition, the monitor includes modern connection options. It supports DisplayPort and HDMI for easy setup. You can connect gaming PCs, consoles, and media devices quickly. This adds strong flexibility to your setup. Moreover, the slim bezel design gives the monitor a clean and modern look. It fits well on small and large desks. The stand allows tilt adjustment for simple comfort control. Wall mounting is also supported for clean setups. Overall, the ViewSonic VX2758A-2K-PRO-3 27″ 2K 240Hz Gaming Monitor delivers speed, clarity, and smooth performance in one display. It improves gaming accuracy and visual comfort. This monitor is ideal for fast gaming, daily use, and competitive players. Specifications: Resolution : 2K QHD Display : 27″ IPS Refresh Rate : 240Hz Response Time : 1ms
HP M24f Monitor Overview The HP M24f is a 24-inch Full HD monitor designed for work and everyday use. It offers a slim design and reliable performance. As a result, it suits offices, home setups, and students. 24-Inch Full HD Display This monitor features a 24-inch Full HD resolution. Therefore, text appears sharp and easy to read. Moreover, images look clear and well balanced. Because of this, it supports long working sessions comfortably. In addition, the wide viewing angles improve screen visibility. As a result, content stays clear from different positions. Smooth Visual Performance The HP M24f delivers smooth visuals for daily tasks. As a result, scrolling and browsing feel natural. Furthermore, the display maintains consistent brightness. This improves overall viewing comfort. Eye Comfort and Anti-Glare Screen This monitor includes eye comfort features. Therefore, it helps reduce eye strain. In addition, the anti-glare coating minimizes reflections. As a result, users can work comfortably in bright rooms. Connectivity and Compatibility The HP M24f includes HDMI and VGA ports. As a result, it connects easily to modern and older devices. Moreover, setup is quick and simple. Therefore, users can start working right away. Slim Design and Mounting Options The monitor features a sleek and modern design. In addition, it supports VESA mounting. As a result, users can save desk space and customize layouts. Ideal for Daily Use This monitor focuses on clarity and reliability. Moreover, it suits office work, browsing, and media viewing. In conclusion, the HP M24f offers a balanced and efficient display solution. Specifications: 60.5 cm (23.8) FHD (1920 x 1080) Sustainable; Adaptive Sync; Eyesafe® Certified; IPS panel 1 VGA; 1 HDMI 1.4 (with HDCP support)
The ViewSonic VA270-H 27″ FHD 100Hz Monitor delivers smooth and clear visuals for daily work and entertainment. Its Full HD resolution shows sharp text and clean image details. The large 27-inch screen gives more space for multitasking. This helps improve focus and comfort during long work sessions. Moreover, the ViewSonic VA270-H 27″ FHD 100Hz Monitor features a fast 100Hz refresh rate for smoother motion. Scrolling feels softer and more natural. Videos play with less blur and clearer movement. As a result, the viewing experience feels more comfortable. In addition, the monitor uses IPS panel technology for wide viewing angles. Colors stay clear and accurate from all sides. This helps during shared screen use and group work. The image remains bright and stable at every angle. Furthermore, the ViewSonic VA270-H 27″ FHD 100Hz Monitor includes eye comfort features for long daily use. The low blue light mode helps reduce eye strain. The flicker-free design supports long viewing without discomfort. These features protect your eyes during extended screen time. Also, the monitor provides flexible connection options for easy setup. It includes HDMI support for modern devices. You can connect laptops, desktops, and media players with ease. Switching between devices becomes fast and simple. In addition, the slim bezel design gives a clean and modern look. It fits well in both home and office spaces. The stand supports tilt adjustment for better viewing comfort. Wall mounting is also supported for clean desk setups. Moreover, the display works well for office work, browsing, and video streaming. Text appears clear and easy to read. Daily tasks feel more organized and comfortable. The large screen improves workflow and focus. Overall, the ViewSonic VA270-H 27″ FHD 100Hz Monitor offers clarity, smooth motion, and daily comfort. It supports work, study, and entertainment with ease. This monitor is a smart choice for users who want smooth performance and a large display. Specifications: Display : 27″ IPS Resolution : FHD 1920 x 1080 Refresh Rate : 100Hz Response Time : 1ms
Brand Microsoft Connectivity Technology USB Connector Type USB Compatible Devices Laptops Compatible Phone Models Microsoft Special Feature Travel Mounting Type Wall Mount Total USB Ports 1 Wattage 65 watts Microsoft Surface Power Supply 65W and Power Adapter Non Retail Packaging
The Samsung 55″ QLED Q6F 4K Smart TV QA55Q6FAAUXTW delivers vibrant picture quality and smart entertainment features in a sleek and modern design. It uses advanced QLED technology to produce bright colors, sharp details, and impressive clarity, making movies, sports, and games more enjoyable on the 55-inch screen. QLED technology uses Quantum Dot enhancement to improve color accuracy and brightness. As a result, images appear vivid and lifelike across a wide variety of content. Dark scenes retain important details, while bright scenes remain balanced and clear. This creates a more consistent viewing experience in different lighting conditions. The 4K UHD resolution provides exceptional image detail and clarity. Therefore, content looks sharper and more refined than standard Full HD. In addition, Samsung image processing enhances lower-resolution content, helping it appear closer to native 4K quality. HDR support improves contrast and expands the visible color range. This allows brighter highlights and deeper shadows, creating more realistic images. Fast-moving scenes also appear smoother and clearer, making sports broadcasts and action-packed content more enjoyable. The Smart TV platform provides access to popular streaming services, apps, and connected home features. It offers a responsive interface that makes navigation simple and convenient. In addition, the slim design and narrow bezels give the Samsung QLED 55 Q6F 4K Smart TV QA55Q6FAAUXTW a modern appearance that fits well in bedrooms, living rooms, and entertainment areas. Overall, this Samsung QLED TV combines vivid colors, sharp 4K resolution, and smart functionality for a complete home entertainment experience. Specifications: QLED technology delivers vibrant colors and enhanced brightness 55-inch 4K UHD display provides immersive viewing HDR improves contrast and image realism Smart TV platform supports streaming apps and connected features Slim design complements modern living spaces
Enhance Your Viewing Experience with the HP FHD 27” Monitor | V27i In today’s digital age, having a reliable and clear monitor is essential. The HP FHD 27” Monitor | V27i delivers. Transitioning from your old monitor to the V27i is straightforward, even if you’re not tech-savvy. This 27-inch monitor offers a spacious screen, perfect for work, entertainment, and everyday tasks. Its user-friendly interface ensures anyone can use it without complicated settings. The V27i provides crisp and clear visuals with Full HD resolution, enhancing your viewing experience. With its sleek and minimalist design, it complements any workspace or home setup. The monitor’s energy-efficient design saves power and reduces your environmental impact. In summary, the HP FHD 27” Monitor | V27i offers a simple and impressive solution for your computing needs. Elevate your viewing experience with this accessible and reliable display. you can always check here and if you like to see more options you can always check here! Specifications: HP V27i G5 FHD Monitor (65P64AS) Display size (diagonal) 68.6 cm (27″) Low blue light Yes (TÜV certified) Panel bit depth 8 bit (6 bit + FRC) Pixels per inch (ppi) 82 ppi Resolution (maximum) FHD (1920 x 1080 @ 75 Hz) 1 year warranty
Samsung Lebanon 55″ UHD The Samsung Lebanon 55″ UHD See more on a 55-inch, 1000R curved screen. Quantum Mini-LED achieves next-generation depth to deliver exceptional picture . 55″” large screen & 1000R curvature Be immersed in lifelike images. The 55-inch screen delivers a picture that overwhelms your senses. creating an experience superior to anything seen before. This is upgraded by 1000R curvature to wrap around your field of vision for maximum immersion. Cockpit Mode & Eclipse Lighting Feel like you’re in a cockpit. Rotate the screen to Cockpit Mode with HAS, tilt and pivot for an optimal screen environment. This perfect positioning creates a new sense of world-blending , further by Eclipse Lighting. Quantum Matrix Technology An unrivaled visual experience. Revolutionary Quantum Matrix Technology with Quantum Mini LEDs . creates controlled brightness and perfect contrast for refined definition. The advanced 14-bit back light unit allows detailed HDR control which creates unmatched picture quality. Neural Quantum Processor Ultra Enjoy powerful cinematic By combining 20 multi-layer neural networks. the AI-Powered images to restore every detail, pixel by pixel. Automatic and upscale the resolution of whatever you’re watching. HDR 10+ gaming See every detail in all its glory. From shadows to sun-scorched scenes, the t ratio enables enhanced . color expression and depth. Get a competitive edge with HDR 10+, which automatically adapts. games in real-time to show you every detail that could lead to victory. Matte display Focus only on what matters. The distraction-free matte screen absorbs, not reflects. artificial and natural light, keeping you laser-focused during the toughest battles and hardest levels. Sound Dome Technology Four corner speakers and two central woofers result in a 60W 2.2.2 channel with the lowest 45Hz. notes of any gaming screen or gaming soundbar. AI Sound Booster and Dolby Atmos take it to the next level. you in a that places you inside the gaming world. Specifications: Specifications Screen Size (Class)55 Flat / CurvedCurved Active Display Size (HxV) (mm)1209.6(H) x 680.4(V) Screen Curvature1000R Aspect Ratio16:9 Panel TypeVA Brightness (Typical)600 cd/㎡ Brightness (Min)420 cd/㎡ Contrast Ratio Static1,000,000:1 (Static) Contrast Ratio (Dynamic)Mega DCR HDR(High Dynamic Range)Quantum HDR 32x HDR10+Yes Mini LED Local DimmingYes (1,056 zones) HDR10+ GamingYes Resolution3,840 x 2,160 Response Time1ms(GTG) 3 year warranty Manufacturer Link
The AOC 27G40 27″ 180Hz Gaming Monitor is built for serious gamers who want fast and smooth performance. It features a 27-inch Fast IPS screen with Full HD resolution. The colors are bright, and the details are sharp from every angle. With a 180Hz refresh rate, your games will run ultra-smooth and clear. Fast motion feels natural with no lag or delay. The 1ms response time helps reduce motion blur and ghosting during fast-paced scenes. Thanks to Adaptive-Sync, you won’t have screen tearing or stuttering. This makes gameplay seamless and enjoyable, even in intense battles. The monitor also supports HDR10 for improved contrast and color accuracy. It covers 128% of the sRGB color space, giving you bold and rich visuals. The screen reaches 300 nits of brightness, so everything stays clear in bright rooms. The AOC 27G40 27″ 180Hz Gaming Monitor includes HDMI 2.0 and DisplayPort 1.4 connections. You can easily connect your PC, console, or other devices. Its ergonomic stand lets you adjust the height, tilt, swivel, and pivot the screen. This helps you find the most comfortable viewing angle. You can also mount it using a VESA-compatible setup for more flexibility. Whether you’re gaming casually or competitively, this gaming monitor delivers excellent speed, clarity, and color. It’s built to meet the demands of modern gaming with style and comfort. Specifications: Display : 27″ Rapid IPS Resolution : 1920×1080 FHD Refresh Rate : 180Hz Response Rate : 0.5ms Speaker : 2W x2 Adjustable : Fully adjustable
The MSI MAG 274QF X24 monitor delivers sharp 27″ WQHD visuals with a high 240Hz refresh rate for smooth motion. It offers responsive gameplay and fast action performance. Its Rapid IPS panel provides vivid colors and wide viewing angles, ensuring consistent image quality from many positions. The monitor supports AMD FreeSync Premium to help reduce screen tearing and stuttering. This contributes to a fluid gaming experience. It also includes HDR Ready support to enhance contrast and display detail in bright and dark areas. The sleek flat design with anti-glare surface supports long sessions with less eye strain. The MSI MAG 274QF X24 monitor is a strong choice for gamers who want fast refresh performance and sharp 2K visuals. Specifications: 27″ WQHD (2560×1440) Rapid IPS panel with vivid colors 240Hz refresh rate for ultra-smooth motion 0.5ms (GtG) response time for fast responsiveness AMD FreeSync Premium to reduce screen tearing HDR Ready support for enhanced contrast and detail
HP Gk400F Mechanical USB Gaming Keyboard, Dust & Spill Resistant, RGB Backlit Keys, Metal Panel, Full-Sized Keyboard Design About this item [Quick. Comfy. Accurate] Comfortable and Durable full-sized keyboard designed. [Plug-in and type] Get to typing quicker with the USB plug-and-play setup that’ll have you connecting to your PC faster and easier than ever [Dust-proof & splash-proof] Mechanical metal panel, dust and spill. Resistant. [All-day comfort] This keyboard is designed for optimal comfort to fit your natural position, keeping your wrist feeling good all day. [Let there be LED] Lightsync RGB Backlit Keys and auto sleep mode support.Brilliant RGB Color Spectrum illumination.
