I don't care what you grow, bottom line is that if you give it the voltage it wants it should be safe. If it is a bad design then I can't say.
Actually, anyone out there interested in growing smoke - it is almost not w orth it now. It is legal to grow in many places now and that means those pe ople will not be buying. Plus now they got vapes and those are efficient an d not that easy to make, and they will win a good piece of the market.
I tried it back when it was worth it and all I got out of it was junk and a lmost ten grand in utility bills. We didn't really have LEDS or CCFLs then , I had sodium and nickel hydrydes, 1,200 watts of them and then about 20,
000 BTU to cool the whole mess down.
I could heaver done much better things with that money.
One of the things with LED and CCFL is that I am concerned about their spec tral output. You need UV and all that, and that also may include people. So me people just don't like florescent tubes, old tubes were phosphors, so ar e CCFLs and the newer LEDs. (that's why the can use them to backlight an LC D screen now)
Some people just really like incandescents.