HLG550 vs Gavita? Anyone with experience with either/both?
- Thread starter kdt15
- Start date
skoomd
Well-Known Member
No. They do claim it is a 1000w SE replacement though. DEHPS is ~20-30% better than SEHPS. The HLG 600H kit that costs $300 less than the 550 is 110 more watts, which is like 20-30% better. 550 = 1120ppf and the 600h = 1450ppf
NanoGadget
Well-Known Member
Nope. They list the 550 as a SE 1000w replacement.
NanoGadget
Well-Known Member
Beat me to it!
Stephenj37826
Well-Known Member
No I promote exhausting out of the living area.(cut a hole to the attic or out a window. I also promote the Titan 4 fan speed controller that allows the fan to speed up and down with temperature. Humidity doesn't build up with a slow fan speed generally.... So yes if a person is under 4 lights why not rely on the homes heating and cooling. Where do you put a dehumidifier in a 4x4 or 4x8 anyways . Unless you exchange air you will need both in a sealed room. Does it make sense to seal a 16 SQ ft grow space. ? That is what you implied. 1 light at 1000 and then a 1000 dollar dehumidifier. Doesn't really make alot of sense.
no they claim the 550 will match an SE HPS.
By the PPFD numbers it does (see cree horticultural ref), but I think its actually a wee bit shy from what i see in my own grows..
skoomd
Well-Known Member
Don't forget the PPF. PPFD doesnt tell us everything, just how many photons are hitting a specific area on a flat surface (hence why scam leds like KINDLED have good PPFD numbers, but really low PPF outputs which in turn makes for shitty yield). The PPF tells us how many actual photons the light is putting out, which end up somewhere in your tent. The HLG 550 is 1120 PPF, and most 1000w SEHPS lights are putting out 1100-1200 PPF.
coreywebster
Well-Known Member
The opposite of what I was expecting.
I have seen all the reports both the PPF numbers and the PPFD numbers on a grid.
Again SEE the cree horticultural reference and the HLG report. By the numbers the 550 does match a HPS SE,
BUT and a BIG BUT I do not see that in my grows with my own Samsung strips vs HPS SE 4x4 side by sides.
lukio
Well-Known Member
oh please tell us its the same cut and documented? so rare!
OneHitDone
Well-Known Member
You mean the Titan 4 Speed Controller that VOIDS the warranty of hight $$ Fans such at the 14" Can-Fan MaxFan??
not documented, no journal just my experience of the grow that's ongoing right now.
3 x 4x4s under our own Samsung strips builds and 3 1000HPS SE alternating. Dutch Treat #5.
the HPS has slightly better penetration and a little bit bigger buds. Density is almost the same in this grow. The one mitigating factor is that this is a "winter" grow which seems to favor the HPS side since the warehouse is not heated.
skoomd
Well-Known Member
Are you making sure your temps are a bit higher under the LEDs? Without the IR emission an HPS provides, it's nessasary to run 80-85f temps to achieve optimal growth.
And what color temp are your LEDs? Keep in mind an hps is 2100k usually, and does pack a ton of red in the spectra. Not that 2700-3500k LEDs dont, but something to consider I guess.
Lots of people agree that growing under leds requires slightly different techniques from the grower to get the same results as they did with HPS. Having a LUX/PAR meter helps a lot, you'll miss out on a good bit of yield if your light is several inches too far.
Their are two types of inline fans. some require expensive dimming equipment like the Can-Fan and some don't. I stay away from Can-Fans for that exact reason.You mean the Titan 4 Speed Controller that VOIDS the warranty of hight $$ Fans such at the 14" Can-Fan MaxFan??
skoomd
Well-Known Member
The HPS should have bigger looking buds, because HPS causes more internodal elongation than the LEDs due to all the red/far red and lack of much blue. Nothing is more impressive looking than some huge DEHPS grown colas, but when you get to harvest, you'll find that the reason the LED buds look smaller is because they're more dense
Ill take rock hard buds over fluffier, big ass ones.
Evil-Mobo
Well-Known Member
So where did you read this to regurgitate it? Because you dont have a grow comparing DE hps to LED, so here you are again making shit up you have no clue about or experience with. Just copy pasting what other people have said in other threads.The HPS should have bigger looking buds, because HPS causes more internodal elongation than the LEDs due to all the red/far red and lack of much blue. Nothing is more impressive looking than some huge DEHPS grown colas, but when you get to harvest, you'll find that the reason the LED buds look smaller is because they're more dense
Did you even buy an led light yet? No we are back to wonderland with skoomd..............lol.............
NanoGadget
Well-Known Member
I personally haven't seen anyone claim 300 watts of anything will replace a 1000w HPS since back in the heyday of blurple bullshit and if you see anyone saying that you have my complete support in calling out the B.S..
skoomd
Well-Known Member
I've been in a lot of decent sized grows using dehps here in colorado. My friend actually runs a DEHPS + CMH setup in his basement and his colas are redicuolously huge, but arent as dense as my LED grown buds grown under similar PPFD levels.
It's basic plant biology that longer internodal distance would cause the flowers to be less dense, as the internodes are where the buds start stacking from.
Im not making up shit bud. It's well known LEDs tend to grow denser flowers than HPS for this very reason. Why do you think sativa dominant plants don't have buds as dense as indicas? Because the internodes are more spread on sativas.
