when to hit em with uvb?

fishdeth

Well-Known Member

• Apr 8, 2015

• #41

cc2012 said:

Click to expand...

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

 

qwizoking

Well-Known Member

• Apr 8, 2015

• #42

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

 

fishdeth

Well-Known Member

• Apr 8, 2015

• #43

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.......

 

qwizoking

Well-Known Member

• Apr 8, 2015

• #44

??
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

 

Last edited: Apr 8, 2015

Budzbuddha

Well-Known Member

• Apr 8, 2015

• #45

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.

 

Budzbuddha

Well-Known Member

• Apr 8, 2015

• #46

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.

 

cityworker415

Well-Known Member

• Apr 14, 2015

• #47

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

Click to expand...

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

Sent from my SM-G900V using Rollitup mobile app

 

cityworker415

Well-Known Member

• Apr 14, 2015

• #48

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

 

Dr. Who

Well-Known Member

• Apr 15, 2015

• #49

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

 

Pepe le skunk

Well-Known Member

• Apr 16, 2015

• #50

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.

 

Last edited: Apr 16, 2015