I got a tanning bed to try first (See lab test results, posted above), but now I am experimenting with bulbs that go into regular shoplight fixtures, up to 40w ballast, from tanninglamps4less.com. It will still be a month before I can get new samples to the lab.
I know when I looked at reptile lights, they were low wattage(25w or less?) and I was trying to go by Rosenthal's guidelines of 100w tanning light for every 1000w HPS. (For last 2 weeks...current experiment is about 80w/1k for last 4 weeks, and then will see if 80w/1k for last 6 weeks(more than half!) still shows improvement...may be Christmas b4 I'm done
(This is per contact at T4less, Dennis Brown, who told me growers are working on less UVb wattage for more flowering time. Ultimately, he said they are working on an invisible UVb source that u would just leave on all the time! Cannot do that yet, as the way they generate UVb now is with a lower frequency light passing through a coating stimulating the UVb, however, that other light is what acts as light pollution while flowering)