They won't damage the NODs anymore than will a similar IR laser I'd imagine. The color isn't the issue, it's the output. Most of the color lasers tend to be in the 5mW range but some of the IR lasers can be up to 200mW or more. Now I've used PEQ's and IZLIDs even on high with mine and they work fine provided you don't aim it at the NODs or a reflective surface that reflects a large degree of the radiation back. So in short, a 50mW IR laser will do more damage to the NODs than a 15mW color laser.