You can't use white light torches when you're trying to use a Telescope as the white light causes your eye to dilate. Using a red light you can change telescope settings or read a star map and then go straight back to viewing without any waiting period for your eye to adjust to the light conditions.
Two torches for the price of one!
You choose red light or white light with the flip of a switch.
Brightness wheel sets the desired intensity, from dim to bright.
Red for while at the telescope
White for increased brightness and visibility when packing up