Red is designed to protect your eyes from your natural night vision. With regular white lights or even green lights your pupils will shrink and make seeing in the dark harder. A red light will not have this effect on your eyes. It's not meant for concealment from the enemy.

Some lights have both, I have a rayovac light that i bought one year on the way to the duck pond and it has 4 White LEDS, 2 red LED's and then one single in the middle. All selected in order by the power button so if you want to try it, you can use that option