Blue brother
Well-Known Member
@Grow Lights Australia did a pretty comprehensive study on this and determined that uva ran all day was more effective than uvb ran in increments at increasing secondary metabolites
How much UVA?
- Thread starter UpstateRecGrower
- Start date
UpstateRecGrower
Well-Known Member
..pretty much why I am asking how much UVA I should be looking to supplement with
Budzbuddha
Well-Known Member
When on 12/12 ( after 4-5 week of flower ) I begin a 10-15 minute cycle every 4th hour .
So about 3x during a 12 hour flower. I haven’t tried any other cycle , so I guess one could experiment.
I didn’t want to fry them so I started at 10 minutes then moved to 15 minutes max. At least for me.
I use one of those cheap peg timers / easy to set intervals.
So about 3x during a 12 hour flower. I haven’t tried any other cycle , so I guess one could experiment.
I didn’t want to fry them so I started at 10 minutes then moved to 15 minutes max. At least for me.
I use one of those cheap peg timers / easy to set intervals.
Blue brother
Well-Known Member
Sorry I can’t find the thread to link it to you but if I remember correctly the appropriate dosage (watts/m2) is discussed in depth. And in answer to your other question about how we measure it I’m pretty sure it is in watts like all other EMR
Grow Lights Australia
Well-Known Member
Thanks for the mention. Here is a link to the test you're referring to. There are links to other tests in the same thread.
Latest UVA vs UVB cannabinoid test results
These are the latest results from our ongoing cannabinoid testing into UVA vs UVB light. The most interesting thing is the results are pretty much the same as the other tests we've done: UVA beats UVB This might surprise some people but this is our third round of testing in two years with 13...
www.rollitup.org
UV radiation is measured in milliwatts. The Nichia UVA diodes we use are over 70% efficient. UVA diodes are cheaper, much more efficient and have a much longer life than UVB. Our lights have about 1% UVA (<400nm).
Splinter7
Well-Known Member
my plants seemed to mature faster under uva LED. i ran a uvb light for about an hour with no other uv or uva. plants all took super long to mature...extra 2 weeks or so, even the indicas. my last grow the plants would almost ready day 58 and were perfect by day 65. this last one, they were cut early at day 77/78. different strains, but all of them were like this.
