Soarin';129024 wrote: If you get the light bright enough some of the critters will still be able to see it.
There is a $30 flashlight with dual red/white led's --- 3 red in the middle, 12 white around it with two separate switches for the red and white colors.
I got it at Sportsmen's authority -- you may want to go cheaper or not as bright, but this throws a lot of red light and is very convenient to get full illumination of what's happening in the tank at night.