Strong light small space ,turn down power ?
- Thread starter Joker90
- Start date
pahpah-cee
Well-Known Member
I’ve ran a 500w led in a 2x4 by running it at 50% or so. You’re going to have to watch the plant for it to tell you if it wants more or less.
I use a cheap “par” meter to dial mine in. I also used some electrical equipment to mark down my dial/knob on my led to tell me the actually wattage pull in comparison to where the dial is set.
heat can be the trickiest part. I had my exit exhaust pulling from right above my LED. The QB was so large in the tent that it created a hot pocket.
I use a cheap “par” meter to dial mine in. I also used some electrical equipment to mark down my dial/knob on my led to tell me the actually wattage pull in comparison to where the dial is set.
heat can be the trickiest part. I had my exit exhaust pulling from right above my LED. The QB was so large in the tent that it created a hot pocket.
coreywebster
Well-Known Member
150w should be plenty
Honestly, I gave up on guessing light strength and distance.. for under $40 you can get a meter to measure your light and dial it in perfect for each grow stage. One of these ... https://amzn.to/3PQgGaO
Hiphophippo
Well-Known Member
I’d start low and step it up as the plant needs it. I run led but my hlg lights at 40 percent and 30 inches give me some light light stress in the beginning. I just adjust as needed
I don't think a lux meter helps with grows. I think a PAR or PPFD meter helps.
PopAndSonGrows
Well-Known Member
lux can still be calculated so it does help, it's like using an abacus instead of the calculator on your smartphone, lol
Week4@inCharge
Well-Known Member
This helps tremendously. Especially when (lighting) manufacturers talk exclusively in PAR. Your not guessing with a phone app or cheap lux meter. But...what can you do if your strapped for cash? Then PAr meters are not cheap.
How to Use a Lux Meter to Increase Cannabis Yields - RQS Blog
Among pH testers, loupes, and refractometers, lux meters are a useful tool cannabis growers can harness to ensure optimal plant productivity and health.
Okay I am on HLG website and on the new Blackbird light and looking for any info on LUX but nothing comes up? How much lux do these lights give off? There is also no "lux map" of how the light spreads the lux? No mention of how many LUX I need in flower either? How is LUX helpful again?
Yes, Royal Queen, shitty Euro white label trash genetics. But sure, lets take their word in growing dank.How to Use a Lux Meter to Increase Cannabis Yields - RQS Blog
Among pH testers, loupes, and refractometers, lux meters are a useful tool cannabis growers can harness to ensure optimal plant productivity and health.www.royalqueenseeds.com
"What makes a lux meter attractive compared to a PAR meter or quantum light meters used by professionals is that it is much cheaper."
Cheaping out and cutting corners always leads to better grows!
Billy the Mountain
Well-Known Member
A $20 lux meter works just fine for measuring light output (blurples not included) for 99% of use cases
Migro has a video demonstrating the linear relationship between lux and ppfd meters
Roughly lux * .017 = ppfd (for a UNI-T lux meter)
PopAndSonGrows
Well-Known Member
My personal opinion; if your phone is newer than 3 yrs old, the screen and/or backing aren't too badly scratched, the free PPFD/PAR in the "app play store" are better than eyeballing it.
Week4@inCharge
Well-Known Member
Those should help with them big lights in small tents. Get everything dialed in.
DrDukePHD
Well-Known Member
So a $29 meter will get me in the ballpark? That's good to know.
Horselover fat
Well-Known Member
A free app for your phone does the same.
HydroKid239
Well-Known Member
Photone app.