Using UVB lights for planted tanks?

[BaRanchik]

I was wondering if one could, or even should, use UVB lights, specifically CFL bulbs, for a wider light spectrum in a planted tank.
Will plants do better? And is it dangerous to the fish?

[Guppysnail]

I use a uva/uvb mercury vapor light borrowed from my bearded dragon on occasion for a plant qt/grow out. I’m careful because of the heat those emit but I also use a full spectrum hydroponic grow lights that are led. Both grow algae better than plants. My best growth is from ordinary white with blue and red shut off I can grow reds and most stems love it. 

[Expectorating_Aubergine]

Yeah, anytime I've had turtles that bask, the uvb light generates a TON of algae....

[BaRanchik]

On 12/28/2021 at 6:26 PM, Guppysnail said:

I use a uva/uvb mercury vapor light borrowed from my bearded dragon on occasion for a plant qt/grow out. I’m careful because of the heat those emit but I also use a full spectrum hydroponic grow lights that are led. Both grow algae better than plants. My best growth is from ordinary white with blue and red shut off I can grow reds and most stems love it. 

 

On 12/29/2021 at 3:38 AM, Expectorating_Aubergine said:

Yeah, anytime I've had turtles that bask, the uvb light generates a TON of algae....

Got it, so UVB isn't such a good idea. Thanks for your input!