Hey man, yeah, they do carry an all red one. If you would like, you can specify exactly what spectrum you would like and they quote whatever you ask for. Seems reasonable. I got a quote for a custom order, and it was only $50 higher, but includes 660nm, 630nm, 610nm, 450nm, and 410nm. I pretty much tailored this light to my specifications, but like I said, I'm 99.9% sure that they already have an all-red spectrum lamp. Pay attention to my thread, and I'll be updating tomorrow sometime.