For Slide Viewing And Film Negative Scanning, Use The Slide Viewer Light Box Ideal Photographic Light Source: Color temperature: 5600K200k, simulates natural white light to give negatives and slides a natural tone when viewing or photographing. Color Render Index 95Ra(measured data 98.6Ra), the high CRI helps restore true color of the original image. A perfect light tool for viewing and digitalizing negatives and slides with your phone and camera Stepless Brightness Control with Smart Memory Feature: Touch the switch once to turn on/off the light box. Then hold the press of the switch to adjust the brightness, the brightness will change continually (bright to dark, dark to bright), and release it till you get the ideal brightness. This light pad can smartly memorise the last brightness you use Super Bright, Even and Flicker-Free Illumination: This light box adopts double-sided LED light design(brightest A4 size light pad you can find in the market), providing brighter and more even light than other one-side light box. The Flicker-Free LED helps relieve visual fatigue in long time usage. Max brightness: 5490Lux. LED Life Span: 50000 hours. Ultra-Thin with Large Active Area: This light pad is ONLY 0.26 inch thick. Active area 12?x8.3?, the large area makes it more efficiently for you to convert negatives, films and slides into images with phone/camera (up to 20 slides at one time). Type-C USB Interface: This light pad comes with Type-C USB cable. With USB Interface, you can easily find a power source anywhere, the power bank, your computer or with USB adapter