when to hit em with uvb?

cc2012 said:

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There ya go!
That's the vid I watched that convinced me.

Lmao that dude in the vid always cracks me up
Such a moron

Dude, chill

Be nice or piss off would ya?
If something has worked for someone, so be it.
You don't wanna run UVB... freakin great.
Take your comments elsewhere please.......

??
I do

You did read my post explaining uvb yes?

Doesnt change my opinion of that dude. I remember when he did that vid talking about thc percent lol, was great. You dont have to agree with my opinion of him, but im certainly allowed to share it

All good and simple . Triches will cluster up at certain points of leaves from UVB . You will see them very clearly. Some growers start UVB during first few weeks of flower , I do either mid or late stage flowering usually at last 2 weeks before chop.

I run to 2 lamps for 1 hour BEFORE dark period. I rotate plants once every 30 minutes.

At 4 inches this lamp will give you 4300 lux / 1150 UVA / 195 uW UVB.
Note : farther than 4 inches UVB drops significantly . Keep at 4 - 6" only.

hyroot said:

depends on the percentage of uvb. 5% or less all day long. 10% 5-6 hours a day. 20% 2 hours a day. All during veg and flower

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@hyroot I don't know my CLW uvb % but I think the are 20 watts.

Sent from my SM-G900V using Rollitup mobile app

20 to 30 minutes at lights on with average 18 inches canopy height below light starting at week 5

Sent from my SM-G900V using Rollitup mobile app

All reptile UVB bulbs are ONLY effective to 18". Over 18" and the UVB drops off at a severe rate.....This is a safety feature to keep humans from the UVB exposure.
Now 400w Mercury Vapor bulbs should be kept 18" away...They put out so much UV radiation that they can cook your plant...

Doc

For people paying attention here is why 18 inches or less is important as is bulb manufactor.
Very effective at explaining the inverse square law of light intensity in uvb bulbs.
Oh and the 400 watt MV are the slim slam jimmmy jam. Awesome lights.
Would love to see the meter reading from those babies. Heat would be another good reason to keep them 18 inches away. Have had 10 % uvb touching buds before and it browned them out where they touched. But it was a small area and it was due to heat, not intensity from a florecent bulb.