Lol, after reading the first couple of sentences I was gonna suggest researching the transmission characteristics but you've already done a fantastic job of that. I was not aware that plants don't like UV light (still not sure I accept that). Sounds like what you've got will do a fine job. I love my cooltube and it works so well I'm probably going to go with a 600 or 1000w instead of my 400w next time. It's about 18" from my young plants and they don't mind at all.
doco Reviewed by doco on . Sealing Off Heat With POLYCARBONATE Instead Of COOLTUBES . So I went out and gots me a large sheet (100cm * 70cm) of 4mm polycarbonate. Its almost the size of the grow room and leaves a space of like 10 - 15 cm around the edges. I'm hanging it up as a sort of shelf between the lights and the plants, dividing the room into two compartments. It insulates very well, and shuts off a lot of heat in the upper compartment of the room. Anyone think this is a viable alternative to a cooltube? Any opinions? I'd love to hear any opinions, I'd hate Rating: 5