Best lights led, cob, hps ?

[Farmer Geddon]

Have run 2 grows so far and learned in the
second grow that I do not want to run it at 100%.

I'm intrigued by the possibility of there being too much light.

That's a foreign concept to those of us who have only used hid lighting. I'm wondering if there is another factor involved. ec too low maybe? Not enough co2? I can also see the possibility that there was never too much light with hid because the extra heat would kill them double quick.

[Blue61]

Have run 2 grows so far and learned in the
second grow that I do not want to run it at 100%.

I'm intrigued by the possibility of there being too much light.

That's a foreign concept to those of us who have only used hid lighting. I'm wondering if there is another factor involved. ec too low maybe? Not enough co2? I can also see the possibility that there was never too much light with hid because the extra heat would kill them double quick.

Gardro is the one to answer that. I do know there can be to many photons for the plants. Not sure if DLI helps to figure this out or not.
Need to refresh myself on that. I'll take a look to see if I can find what Gardro said about this in previous thread. Been quite a while
not sure if I can find it.

[gardro]

Have run 2 grows so far and learned in the
second grow that I do not want to run it at 100%.

I'm intrigued by the possibility of there being too much light.

That's a foreign concept to those of us who have only used hid lighting. I'm wondering if there is another factor involved. ec too low maybe? Not enough co2? I can also see the possibility that there was never too much light with hid because the extra heat would kill them double quick.

Just keep ppfd at or below 1000 and you will never run into issues with photos.

With autos, those 1000 umols per second add up into the hours so you can get unhealthy DLI with 24/0 etc.

Too much light doesnt actually do the damage unless its 2500ppfd ball park but too much light, like youve said with not enough EC, temp or CO2 will result in deficiencies that get worse the longer the defecit remains in place.

Turning down the light helps identify the issue.

Low temps will bring out deficiencies if light is higher than the metabolism will allow.

[CheapHomeGrown]

One thing folks might not realize is watt per watt leds are different then hps.
For an example I'll use my HLG 350R with diablo boards. Max draw is 330w
but is the equivalent of 600w hps. Have run 2 grows so far and learned in the
second grow that I do not want to run it at 100%. Just bought a watt meter
so next grow I'll know how many watts I'm pulling from the wall. Never had
buds so hard using 600w hps.
Hope this helps someone out.

Just looking over the HLG 350R_PPFD_Report, trying to understand how much canopy the light covers at 15" ,the penetration seems to drops off at 24" (giving me 9" of good canopy growth) if I read this right, still learning about LEDS.
Does the light covers a 4ft x 2ft canopy based on the report?

[CheapHomeGrown]

Just keep ppfd at or below 1000 and you will never run into issues with photos.

With autos, those 1000 umols per second add up into the hours so you can get unhealthy DLI with 24/0 etc.

Too much light doesnt actually do the damage unless its 2500ppfd ball park but too much light, like youve said with not enough EC, temp or CO2 will result in deficiencies that get worse the longer the defecit remains in place.

Turning down the light helps identify the issue.

Low temps will bring out deficiencies if light is higher than the metabolism will allow.

Does high levels of light degrade THC in late flower ?

[gardro]

Does high levels of light degrade THC in late flower ?

Probably not from HPS but some led growers taper off with the EC.

The pros on here manage to run 24/0 at full tilt and not heard many complaints.

Just low levels of UVB late in flower messes up final yield.

[Easy-T]

Think it's one of them suck it an see.. You either like led or you don't.. You can only look at so many charts.. You'll never know cause every growers has different environment /experience

[gardro]

One thing folks might not realize is watt per watt leds are different then hps.
For an example I'll use my HLG 350R with diablo boards. Max draw is 330w
but is the equivalent of 600w hps. Have run 2 grows so far and learned in the
second grow that I do not want to run it at 100%. Just bought a watt meter
so next grow I'll know how many watts I'm pulling from the wall. Never had
buds so hard using 600w hps.
Hope this helps someone out.

Beautiful lights them Blue, I never did get one but im going for the older brother the 260 XL as money is tight.

[CheapHomeGrown]

Probably not from HPS but some led growers taper off with the EC.

The pros on here manage to run 24/0 at full tilt and not heard many complaints.

Just low levels of UVB late in flower messes up final yield.

Used to hear about growers leaving there plants in the dark for 24/48hours before harvest(more THC and resin, don't know if it works), so I started to turn my lights down for the last 7-10 days (30,000 lux), they turned out a lot stronger(covered to THC),but this could be something else, just wondered if anyone else has tried this.

[CheapHomeGrown]

Think it's one of them suck it an see.. You either like led or you don't.. You can only look at so many charts.. You'll never know cause every growers has different environment /experience

This is the "horticulturelightinggroup.com" its there report they got done on there light.

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