here are some photos:
https://webspace.utexas.edu/eleyan/temp/nightlight1.JPG
https://webspace.utexas.edu/eleyan/temp/nightlight2.JPG
The color of the LEDs is greenish-blue. They consume so little power that you can just leave them on 24hrs. I got a pack of 2 for about $5 and 2 extension cords for $1 each. I ended up cutting the cords and connecting them in a "Y" connection with one night light on each end. It looks cool when all the lights are off, but its so dim that I couldn't take a photo of the tank in the dark. My camera does not have night mode either.