hlg light burn height vs dim

If getting light burn and your at the given distance from canopy .
Do you raise the lights or dim.

Do you run dimmed at reduced lumens.
Or
Do you run full and raise them above given canopy distance..
Where and at whatpoint does the photons being emmited decline ..is the higher height reducing amount of photons over distance
Or is the dimmed light better delivering photons by being closer ? But at howmany less photons? Are more delivered ?

Some grows run em on the canopy others run 6ft above . Hlg350rs x3 in 4x8
Growing amazing 1 strain doesnt like light so dimmed it down that side wondered if i should leave it and raise it

Head fucked ha

I dim....saves power.

depending on the light i want enough distance to have a good spread, rest i do by the dimmer, saves really a lot.

cobshopgrow said:

depending on the light i want enough distance to have a good spread, rest i do by the dimmer, saves really a lot.

Click to expand...

Isn't dimming down going to reduce overall yield? How does the dim work is it reducing it from 1000ma to 700ma ?

I mean if I use less eats I yield less pot right ? If I got 1000w led and dim to 50 I'm using 500.. so if I get 1how I'm not using 1000w anymore but 500. So half yield ? Would flooding full 1000w higher up not yield more delivering more watt?

That's how hps works anyways lol note bad more u get. If I dimmed to 400 I'd suffer and peeps are like nah run it boosted 10% and up ya cents more watts the better..

Is there some science trick im missing for led ? Or are people just seemingly dimming less yields and just ignoring yields ?
Surely people still wana get max yield etc right ? See peeps smashing grows so is it more about hitting efficiency to get 2gpw? Or what's up.

I just don't wana loose any yield from swapping from my hps system. And obviously the selling factor for me was that hlg lights in tent will smash the hps off the wall with half the power and more yields.

The I can't seem to run at full power I've been trying to push it. Worried to drop lower and I see some stress so back off but my head like fucksake or not at full bang yet or under running the wattage u worked out math for .
Otherwise i cuda got 500watts instead if ya get me not that I wana I love my 350s

You can argue this both ways. Personally, with little worries about power bill, I'd raise them and run them on high. Especially if it's far from too hot. Let the plants grow towards the light and find out at what distance they don't wanna go any further up. I mean, either way youre going to have to try for yourself and the full power and raised seems like less risky for yield than the opposite, and you could find out where your plants like it.

As for not being able to run them on full in a tent, you were warned about this...

I used to raise and lower. Now I just spread out the light by adding more boards to the same driver. 4 boards on a 320-watt driver. Max efficiency and I don't need a dimmer.

Good advice already mentioned, I'll chime in with the higher intensity you run your LED the more your humidity will drop. Humidity <40% over time will contribute to light burn.

Rocket Soul said:

You can argue this both ways. Personally, with little worries about power bill, I'd raise them and run them on high. Especially if it's far from too hot. Let the plants grow towards the light and find out at what distance they don't wanna go any further up. I mean, either way youre going to have to try for yourself and the full power and raised seems like less risky for yield than the opposite, and you could find out where your plants like it.

As for not being able to run them on full in a tent, you were warned about this...

Click to expand...

Thanks man. Nah I'm not struggling only half way up tent I didn't get 650 600 or 550s the 350s are fine. Gone be better harvest than my hps hands down .

Just says 15inch off canopy I've tried to stay there. So dimmed. I've still go 20inch I can raise them just ive had to dim them to stay there when I thought full power and raised be better like our saying small electric is nothing. I'd rather run full watts . But didn't know if the distance being greater than recommended was a seesaw scales high and watt high or low n dim low . And would reduce proton delivery if I steer off the 15 recommended

There crazy big buds 3x 350rs I went with when they recommended 4 of them.

Never had such full plants but at around 75 power and low. But I could do max and high and they'd be happy. So il crank the light up both ways.

The temps only 25 today n it's hot lol could do with the extra temps for cal n mg transfer more stable at 28 ain't it . And dimmed the spectrum advertised I heard gets altered dunno how true that is

sonnyjim said:

Good advice already mentioned, I'll chime in with the higher intensity you run your LED the more your humidity will drop. Humidity <40% over time will contribute to light burn.

Click to expand...

True humidity drops. And I noticed that my burn started at 40 humid when I saw it I raised the humidity vpd management.
I like to stay 65 to 70 iff poss i drop to 60 for my filter .
My veg can is hooked up to my flower intake so i fill the veg plants trays water and it raises easily

I dehuniddify to keep it sweet as its Easyr than filling the water machine up daily

there are many phases of the plants life where they simply cant take full blast or dont need it, as theyre quite saturated allready.
if your plant is smaller then light fixture itself, there is no need to light the corners f.e.
you should better think in photons reaching your plant canopy then thinking in watts, if you maxed out your plants with a 1000W hps you will likely need less watt to max them out with leds but you wont harvest way more, if any.

a rasied light have the benefit of emiting softer light, due to the reflections, drawback is the refelctions cost you some photons, there is a optimun to find.

simply give them what they can take and dont wonder if you cant go full power, you will likely still have good yields.

cobshopgrow said:

there are many phases of the plants life where they simply cant take full blast or dont need it, as theyre quite saturated allready.
if your plant is smaller then light fixture itself, there is no need to light the corners f.e.
you should better think in photons reaching your plant canopy then thinking in watts, if you maxed out your plants with a 1000W hps you will likely need less watt to max them out with leds but you wont harvest way more, if any.

a rasied light have the benefit of emiting softer light, due to the reflections, drawback is the refelctions cost you some photons, there is a optimun to find.

simply give them what they can take and dont wonder if you cant go full power, you will likely still have good yields.

Click to expand...

how would one calculate photons on led and hps?

2cent said:

Isn't dimming down going to reduce overall yield? How does the dim work is it reducing it from 1000ma to 700ma ?

I mean if I use less eats I yield less pot right ? If I got 1000w led and dim to 50 I'm using 500.. so if I get 1how I'm not using 1000w anymore but 500. So half yield ? Would flooding full 1000w higher up not yield more delivering more watt?

That's how hps works anyways lol note bad more u get. If I dimmed to 400 I'd suffer and peeps are like nah run it boosted 10% and up ya cents more watts the better..

Click to expand...

more W does not equate more yield. Wattage does not = usable light the same as lumens do not equal PAR or ppf or umol or whatever you want to measure in. dimming LEDs is NOT the same as dimming a HPS so whilst your logic applies for HPS(or any HID) it does not apply to LEDs. I can achieve better yields with more lights dimmed than I can with less lights ran at 100%. I'm getting better efficacy matching my previous yield and using less electricity which translates into lower cost of cooling. In one case I was matching the yield of a 3 * 600w HPS with 4 * 550QB's ran at 300w each. That is 1200w matching 1600w with a clear improvement on quality and lower running costs. There is just so much more going on than I can probably articulate right now. but dimming a HPS you change the spectrum and CCT drastically and they were just not built to be dimmed. I cant say the same for LEDs its not comparable.

sonnyjim said:

Good advice already mentioned, I'll chime in with the higher intensity you run your LED the more your humidity will drop. Humidity <40% over time will contribute to light burn.

Click to expand...

2cent said:

True humidity drops. And I noticed that my burn started at 40 humid when I saw it I raised the humidity vpd management.
I like to stay 65 to 70 iff poss i drop to 60 for my filter .
My veg can is hooked up to my flower intake so i fill the veg plants trays water and it raises easily

I dehuniddify to keep it sweet as its Easyr than filling the water machine up daily

Click to expand...

SJ makes a good point here; my answer should really be : you do whatever is best for maintaining your environment in line.
With more heat, rh goes down. True humidity; doubtfully. Maybe in the sense that your able to vent it away easier but just raising temps will not remove water from your air, how could it? It only makes your air better at absorbing water, hence lower rh as it's the true humidity compared to maximum water disolved in the air at temps.

2cent said:

Isn't dimming down going to reduce overall yield? How does the dim work is it reducing it from 1000ma to 700ma ?

I mean if I use less eats I yield less pot right ? If I got 1000w led and dim to 50 I'm using 500.. so if I get 1how I'm not using 1000w anymore but 500. So half yield ? Would flooding full 1000w higher up not yield more delivering more watt?

That's how hps works anyways lol note bad more u get. If I dimmed to 400 I'd suffer and peeps are like nah run it boosted 10% and up ya cents more watts the better..

Is there some science trick im missing for led ? Or are people just seemingly dimming less yields and just ignoring yields ?
Surely people still wana get max yield etc right ? See peeps smashing grows so is it more about hitting efficiency to get 2gpw? Or what's up.

I just don't wana loose any yield from swapping from my hps system. And obviously the selling factor for me was that hlg lights in tent will smash the hps off the wall with half the power and more yields.

The I can't seem to run at full power I've been trying to push it. Worried to drop lower and I see some stress so back off but my head like fucksake or not at full bang yet or under running the wattage u worked out math for .
Otherwise i cuda got 500watts instead if ya get me not that I wana I love my 350s

Click to expand...

These lights are so bright.... you don't need to worry about dimming.... its gonna help yield coz they get too bright. Your better off working about temps and keeping them perfect