This device can be used to measure illuminance, color temperature, ⊿uv, xy chromaticity ... If you're interested in light meters, you're probably interested in the best photography lighting ...

Nanocellulose dyed with red onion skin extract can protect solar cells from up to 99.9% of UV radiation up to 400 nanometers.

In some people that are photosensitive, UV light from sunlight and indoor light sources can trigger a lupus flare. In addition to sunlight, ultraviolet rays are also given off by several different ...