Kingrow1
Well-Known Member
After 6 months you notice the bulbs arent as bright as brand new and after 12 months they got to be changed, i like to run bulbs 6 months apart on average that way i always got old and new bulbs hence halving the small light loss.When I looked at all of this a couple years ago before making the plunge, there were some reports / threads out there that measured the wavelength and output in new and old bulbs. It was found that some bulbs did not put out what they claimed. Others had UV-b drop significantly in 6 months.
So dose this suggest that the levels of some flouros in uv could be adequate for plant growth, i mean i get really crystally plants with them rspecially the cfl's over the flouros? Peace