HLG LED 4x8 Vegging ONLY Flood Tray Lighting Question

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newbplantgrower420

Well-Known Member
Cant seem to get a proper answer from anybody including HLG representatives on instagram. So ill ask you guys.

I have a 4x8 flood tray ONLY for VEGGING. Over it I want to put HLG quantum board Leds.

I talked to an HLG representative who recommended 2 HLG 550s over a 4x8 area but I go to the website and see that each HLG 550 claims to cover a 6x6 Vegging area. So i ask the representative if each covers 6x6 area... why should I get two HLG 550s for a 4x8 area....isnt that overkill? No response.

Im thinking either get 2 240w QB boards (claims to cover a 4x4 vegging area each) or 2 320w QB boards (claims to cover a 5x5 area each).

Can anybody with these HLG lights steer me towards the right direction on which boards to get to cover a 4x8 VEGGING ONLY flood tray. only vegging i dont care about flower because the plants will be moved to another tray for flowering purposes.

thank you in advance.
 
N

newbplantgrower420

Well-Known Member
Renfro said:
They have a square foot print and you are lighting a rectangle.

Use two and run them soft.
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i see. what youre saying in terms of efficiency... i should just get 2 550s and dim them down to use less wattage and that would be better than me getting 2 260s or 2 360s and full blasting them even tho both of the smaller qb would do the job also.... i would just have to full blast it.

am i understanding this correct?
 
DoubleAtotheRON

DoubleAtotheRON

Well-Known Member
newbplantgrower420 said:
i see. what youre saying in terms of efficiency... i should just get 2 550s and dim them down to use less wattage and that would be better than me getting 2 260s or 2 360s and full blasting them even tho both of the smaller qb would do the job also.... i would just have to full blast it.

am i understanding this correct?
Click to expand...
Yes. .. get 2 550's and dim them down to 30-50%, or higher and set them up higher for a larger footprint. The reason I say this is because you may in the future want to have more power if you change things up. They're great lights from seed to harvest.
 
S

Sacred Outlaw

Active Member
newbplantgrower420 said:
Cant seem to get a proper answer from anybody including HLG representatives on instagram. So ill ask you guys.

I have a 4x8 flood tray ONLY for VEGGING. Over it I want to put HLG quantum board Leds.

I talked to an HLG representative who recommended 2 HLG 550s over a 4x8 area but I go to the website and see that each HLG 550 claims to cover a 6x6 Vegging area. So i ask the representative if each covers 6x6 area... why should I get two HLG 550s for a 4x8 area....isnt that overkill? No response.

Im thinking either get 2 240w QB boards (claims to cover a 4x4 vegging area each) or 2 320w QB boards (claims to cover a 5x5 area each).

Can anybody with these HLG lights steer me towards the right direction on which boards to get to cover a 4x8 VEGGING ONLY flood tray. only vegging i dont care about flower because the plants will be moved to another tray for flowering purposes.

thank you in advance.
Click to expand...
I just purchased an HLG lamp myself. Based on the research i did prior to my latest purchase, each 550s light would cover a 6x6 area coverage for veg and 4x4 coverage would be for flowering. Flowering requires brighter more intensity as compared to veg. Hope this helps.
 
jimihendrix1

jimihendrix1

Well-Known Member
HLG is a great light but they overrate the size area they cover

The HLG 550s is good for a 3.3 x 3.3 area. 10.8 Sq/ft. This will give basically 44w Sq/ft

My Gavita 1700e which is 645w is rated by Gavita to cover a 4 x 4 area, and is a direct replacement for a 1000w Hortilux HPS. 1600imol

The 645w Gavita is 1700umol.


Bottom line is going by Gavita Specs one needs 40.3w Sq/ft to equal the very best SE HID

One also needs to use only Samsung/Osram Diodes.
 
DoubleAtotheRON

DoubleAtotheRON

Well-Known Member
jimihendrix1 said:
HLG is a great light but they overrate the size area they cover

The HLG 550s is good for a 3.3 x 3.3 area. 10.8 Sq/ft. This will give basically 44w Sq/ft

My Gavita 1700e which is 645w is rated by Gavita to cover a 4 x 4 area, and is a direct replacement for a 1000w Hortilux HPS. 1600imol

The 645w Gavita is 1700umol.


Bottom line is going by Gavita Specs one needs 40.3w Sq/ft to equal the very best SE HID

One also needs to use only Samsung/Osram Diodes.
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How much are those brother? .... never mind .. I see $1299? Specs do look impressive!
 
N

newbplantgrower420

Well-Known Member
jimihendrix1 said:
HLG is a great light but they overrate the size area they cover

The HLG 550s is good for a 3.3 x 3.3 area. 10.8 Sq/ft. This will give basically 44w Sq/ft

My Gavita 1700e which is 645w is rated by Gavita to cover a 4 x 4 area, and is a direct replacement for a 1000w Hortilux HPS. 1600imol

The 645w Gavita is 1700umol.


Bottom line is going by Gavita Specs one needs 40.3w Sq/ft to equal the very best SE HID

One also needs to use only Samsung/Osram Diodes.
Click to expand...
Im thinking for my flower room. Down the line in a yr Ill be getting Gavita LEDs. I hear nothing but good things about them.

The Gavita LED is it comparable to a single ended hortilix 1000w hps? or double ended?

If its not is the technology up there for LEDs to be as powerful as DE 1000w bulbs yet?

I know a week or two ago HLG made a new LED QB supposedly comparable to a DE 1000w HPS. Whats your thoughts on their new board?
 
jimihendrix1

jimihendrix1

Well-Known Member
HLG says their light is 1770 PPF, and 630w so it basically the same as the Gavita 1700e.

So going by that NO the HLG is not as powerful as the DE Gavita

The DE Gavita is 2100umol
 
BluntMoniker

BluntMoniker

Well-Known Member
I dont believe anyone has said this yet...

But buy the light based on the Flower footprint, not the veg footprint.

Vegetative growth uses less light intensity overall anyway, so your able to cover a bigger area with the lights in veg, than you are in flower.

That specific light, has a 6ft veg footprint, but only a 4.5x4.5ft flower footprint, making it perfect for your needs. You'll have a bit of light overlap, but I'm sure that'll make your plants happy.

Just be sure you have a GOOD way of cooling your tent. I went from 150w HPS, to a 260w HLG and I had temps as high as 95 in my tent when I first put the light in. Had to put a fan above the light pointed down, one below it pointed up, and the exhaust pulling air from directly off the driver to get things to where they need to be
 
Nizza

Nizza

Well-Known Member
if it's veg only try the B-spec boards!
If you aren't sure between the 260 and 320w kits compare the prices. If you go with 260 I recommend an XL heat sync, so if you ever want to add a third board in there with an extra driver you can do it on the same sync. I think No matter what, you'll be happy with what you get.

cost analyisis--- 2 550's prebuilt bspec ~ 850ea ~ 1700$ 1100 w
2 320's kits rspec ~ 485ea ~ 970$ 640w
3 260w kits bspec ~350 ea ~ 1050$ 780w

If it were me, I would probably do the 3 260w bspec kits and see if they can make a change order and upgrade the syncs to the XL's. They will get the boards further away too from eachother spreading the light better for your dimensions
 
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Apalchen

Well-Known Member
I had the v1 320 xl it's the wrong shape for good coverage with 2 on a 4x8 besides the three boards that close together is overkill for veg. I like the above posters idea of 3 of the 260 on the XL heat sink that would offer great coverage.

Have you considered cmh I veg with 2 per 4x8 table and they seem to be working great. I means that's less than 700 watts per table. The bulbs last a long time before needing replaced, and I've recently read that LEDs are wearing out way faster than originally thought. Well I mean they still work after a few years but can drop to like 80% output of original. At that point you can't just replace a bulb like you could with cmh.

Don't get me wrong I want to play with some new leds too but the math on losing 20% of light after a few years scares me does that equate to 20% loss of yield my mind says it does. If I was to hang 20 lights and average 2 a light that's 8lbs a run loss. Not to mention all the fixtures I'm looking at are over 1k dollars so that's 20k in lights. I'm thinking replacing bulbs doesn't sound so bad now.
 
S

Sacred Outlaw

Active Member
Apalchen said:
I had the v1 320 xl it's the wrong shape for good coverage with 2 on a 4x8....

...Have you considered cmh I veg with 2 per 4x8 table and they seem to be working great. I means that's less than 700 watts per table....
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I actually am using a light mover to cover a 4 x 8 area. I'm using the light mover with my 315 CMH and plan on using it with an HLG 550. I am new to the world of LED's but have been using 315 CMH's the last few years and they are fricking amazing! Only time will tell how well LED's hold up against the CMH's etc,.
 
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