UV Results from the community.

[OLD MOTHER SATIVA]

i cannot get/find agro max pure uv in canada and no one will ship

i wanna do a test grow

 

[Halfandhalf]

I did 5 minutes a day at like 20" from week 2 flower and the plants were burned and finished weak. Never doing full cycle with agromax again. I'll do 5 minutes last two weeks and see how that works. Maybe up at 30"or higher.

 

[Airwalker16]

I did 5 minutes a day at like 20" from week 2 flower and the plants were burned and finished weak. Never doing full cycle with agromax again. I'll do 5 minutes last two weeks and see how that works. Maybe up at 30"or higher.

Ya, RandomBlame warned multiple times of the exceptional and overkill power of the PureUV.

 

[Gond00s]

Ya, RandomBlame warned multiple times of the exceptional and overkill power of the PureUV.

im trying to figure out how much he did im going over kill 15 mins every other hour for a 4x8 room bought 4 4fters of the pure uv going to have the whole tent evenly spready with uv. u think this would be fine its going to be almost 3 ft above the canopy going to be using it prob around the last few weeks of flower when the plant stops stretching prob two weeks from that

 

[Airwalker16]

im trying to figure out how much he did im going over kill 15 mins every other hour for a 4x8 room bought 4 4fters of the pure uv going to have the whole tent evenly spready with uv. u think this would be fine its going to be almost 3 ft above the canopy going to be using it prob around the last few weeks of flower when the plant stops stretching prob two weeks from that

One 4 ft per 4X4, 15 mins on an hour for the middle 4 hrs of the 12on cycle. That's all you want in mid flower. Less at first few weeks. Hang 30" or more.

Absolute best thing you can do to utilize those PureUVs though is buy DIMMABLE T5HO ballasts

 

[Rocket Soul]

im trying to figure out how much he did im going over kill 15 mins every other hour for a 4x8 room bought 4 4fters of the pure uv going to have the whole tent evenly spready with uv. u think this would be fine its going to be almost 3 ft above the canopy going to be using it prob around the last few weeks of flower when the plant stops stretching prob two weeks from that

This is one of the reasons i see against florou uv: unless youre running a bulb constantly at low height and low uv intensity youre probably running something high up and switching it on and off, both things that go against commonsense:
Higher hanging height for the entire light loses intensity and increases the need for wattage and switching bulbs on and off every hour is detrimental to the bulb, which isnt all that cheap or long lasting either. Leds can give you solution for both these problems.

 

[mr. childs]

im trying to figure out how much he did im going over kill 15 mins every other hour for a 4x8 room bought 4 4fters of the pure uv going to have the whole tent evenly spready with uv. u think this would be fine its going to be almost 3 ft above the canopy going to be using it prob around the last few weeks of flower when the plant stops stretching prob two weeks from that

i always suggest the 2ft to people first. the 4ft is a killer bulb if starting out.

 

[mr. childs]

This is one of the reasons i see against florou uv: unless youre running a bulb constantly at low height and low uv intensity youre probably running something high up and switching it on and off, both things that go against commonsense:
Higher hanging height for the entire light loses intensity and increases the need for wattage and switching bulbs on and off every hour is detrimental to the bulb, which isnt all that cheap or long lasting either. Leds can give you solution for both these problems.

i hang the 2ft high in a 4x4 & it works well. burned the hell out of some flowers in a 2.5 x4 x5 years ago.

 

[Gond00s]

i hang the 2ft high in a 4x4 & it works well. burned the hell out of some flowers in a 2.5 x4 x5 years ago.

Their probably gonna be 3 feet or higher will it do damage at that height and being rand for 45 mins the whole cycle

 

[Airwalker16]

Their probably gonna be 3 feet or higher will it do damage at that height and being rand for 45 mins the whole cycle

Buy a DIMMABLE T5HO BALLAST.

 

[Airwalker16]

This is one of the reasons i see against florou uv: unless youre running a bulb constantly at low height and low uv intensity youre probably running something high up and switching it on and off, both things that go against commonsense:
Higher hanging height for the entire light loses intensity and increases the need for wattage and switching bulbs on and off every hour is detrimental to the bulb, which isnt all that cheap or long lasting either. Leds can give you solution for both these problems.

TRUE UV-B diodes are closer than they've ever been to a viable option. I honestly can't wait to see it become a widespread addition on boards. Not these Lame Ass 390nm "uva" you see claimed on boards now, but the REAL 285nm UV-B diodes we all have seen.

 

[Rocket Soul]

Nachooo already use them to great effect. for a small grow its an investment of around 120$

 

[OLD MOTHER SATIVA]

285nm has the wrong peak......

 

[Rocket Soul]

If you go down to 280 you start getting a lot of UVC from lefthandside of the spectrum. 285 works and is safer for you and your plants

 

[mr. childs]

If you go down to 280 you start getting a lot of UVC from lefthandside of the spectrum. 285 works and is safer for you and your plants

which makes me wonder what the 100% uvb bulbs that htg sold years ago were nm wise ?

 

[Rocket Soul]

which makes me wonder what the 100% uvb bulbs that htg sold years ago were nm wise ?

No idea.

 

[Airwalker16]

which makes me wonder what the 100% uvb bulbs that htg sold years ago were nm wise ?

HTG is AgroMax. The PureUV bulb is 75% uvb and 25% uva.

 

[OLD MOTHER SATIVA]

If you go down to 280 you start getting a lot of UVC from lefthandside of the spectrum. 285 works and is safer for you and your plants

you don't want 285 nm..its too low..the diodes you need don't seem to be available ..

 

[cobshopgrow]

think i have to be said, that nachooo just use the 285nm 2h a day, with some safety light on also.

 

[Rocket Soul]

you don't want 285 nm..its too low..the diodes you need don't seem to be available ..

Guess i missunderstood you. But yes, there are uvb 285 diodes on stars around...