Quote Originally Posted by Dogznova
OK... You can also use t5's to target blue 420nm also. They are sold as fish tank lights. Actinic 420 Bulbs, they also have Actinic 460 Lamps. But if you have the choice for your blue light it's best to stay below 445nm. Fluorescent and t5's are ok as supplemental blue light sources. But if you don't have 440nm blue LED's I would use a small MH mixed with the blue fluor's for the blue light source. Of course this is providing your trying to do a 24 hour flowering and not a standard 12/12.

So my question is what type of flowering are you trying to do?
I'd like to go 24hrs. But I will start at 12-12. I doubt if I 'll run the HPS for more than a couple hours, then fill in with Halogens. I might end up hanging a curtain where the HPS is. Who knows what I might do. Could end up with lasers.
scott9116 Reviewed by scott9116 on . HID Time factor manipulation I've been following the UV-B thread for a while. Cool stuff. Makes me want to get back into growing. But, what really gets me going is the Martian stuff and the light time factors for increasing tric production. I seems to me that, unless you've got a ton of cash for LED's or have alot invested in HPS setups already, it's really hard to get down to the magic 1.8 and decent yield. However, I have some ideas to get closer: Fluorescent Supplemental Lighting: http://kinoflow.com has HO Rating: 5