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.