I think it matters how you're going to use the LEDs. For occasional viewing, I doubt it matters whether your LED is red or blue. If you're going to use it to provide a day/night cycle, then they're going to be on for hours. In that case, I imagine it matters much more.
I used a LED strip in by BP's enclosure, but I only used it for occasional viewing. Even then, I used it on the dimmest setting. I imagined a shy snake, like a BP, would be stressed by bright lights.