UVB bulbs

[kfos]

Hey gardeners uvb. When do we use it? I have a solar storm 440 with built in uvb. Not sure when to use it? I've read the last few weeks of flower. Opinions please

 

[Sir72]

Hey gardeners uvb. When do we use it? I have a solar storm 440 with built in uvb. Not sure when to use it? I've read the last few weeks of flower. Opinions please

I would use it all the time honestly, except seedlings