LED Lighting suggestions for a small irregular footprint

Dryhops

Member
I have a custom grow cabinet that is built into my kitchen cabinetry. It's essentially just the bottom portion of this shelf:

9e1ad5448e024721d7e5f5c26045ce51--corner-shelves-mudroom.jpg

The footprint is pretty small, 28 inches along the 2 longer edges, 17 inches along the shorter 3 edges. This comes out to be a little less than 5 sqft. This accommodates a two plant scrog that produces 4-5oz every 3 months or so. I've been using a Galaxyhydro blurple for years now and it has performed well enough, but clearly since I purchased it there have been major improvements in LEDs. This is the light: https://www.amazon.com/Roleadro-Gal...coding=UTF8&psc=1&refRID=EHK72RMKHWG2997RP56V

I fully understand why blurples are lacking, can anyone recommend a lighting replacement with the following criteria?:
-Roughly 150watts (I run this entirely off of solar generated power, so power and efficiency is of critical importance)
-I'm comfortable with the DIY versions, but I don't have any way of measuring output. Commercial options are attractive since, hopefully, they test the lights for compliance. I don't want to build a light only to find it doesn't yield.
-I only have 28 inches of height, total. My current light is boxy and doesn't provide consistent light to the edges. Although I have limited plant size and they are close to the lights (8-10 inches), I don't have issues with light burn. A new light would hopefully be thinner, allowing it to be mounted as close to the ceiling as possible. A remote driver might gain me a few inches, which the ladies always appreciate.
-As the footprint is weird, I reasoned that a quantum type board with chips that are more spread out might be more effective in my space, compared to focused COB. If I DIY however, I might be able to strategically place chips to fit the space.

So far, I'm seriously considering:
Two HLG65 V2
One MARS
One Spiderfarm SF1000
One Timber Model 2VL

Thank you for your time
 
Do you think I could mount them with only an inch or so gap with the ceiling? Assuming good airflow from fans, exhaust would be a foot or so away.

Also, is it advantageous to use one driver on two boards and connect them myself? Or just have 1 driver per panel?
 
I've been doing a lot more research and I've pretty much settled on two RSpec QBs from HLG. I'd rather spend extra money to guarantee the quality.

I'm looking at 260w kit from HLG: https://horticulturelightinggroup.com/collections/kits/products/260w-qb-v2-rspec-led-kit

Unfortunately it says that is can dim only down to 135w, while the board themselves can be run as low as 60w and thus could be as little as 120w. I assume this is a limit imposed by the driver itself.

I know this is extremely low wattage, but I feel like two boards is overkill due to my height limitations, unless I can run them really low. Often the canopy is 6" or so from the lights, so I don't want to be in a situation where I can't reduce the wattage any further.

Are there other drivers similar to the HLG-240H in the kit that can be dimmed down to 120w? Or is running two separate boards each with it's own driver my only option?
 
Each Quantum will cover approximately a 2x2 quadrant easily . Also the flat design will allow some space clearance. Even better is remote mount the driver out of cab.

As far as dimming ... easy ... get a B TYPE driver with dimming leads ready for more dim control ( 100k ohm pot ) - ( easy to add ) then you can run as soft as you want.
 
As many strips as you can fit in there, use the walls/corners too. My cab is only 30" high, the entire top is covered with EB Gen 2 strips and pull 105W at the wall over 4.25 square feet. They are run softly enough that they are screwed right into the wood at the top, taking up like a 1/4 inch of vertical space, and the plants can grow right up to the top as long as they don't touch a diode.
 
I have a custom grow cabinet that is built into my kitchen cabinetry. It's essentially just the bottom portion of this shelf:

View attachment 4413968

The footprint is pretty small, 28 inches along the 2 longer edges, 17 inches along the shorter 3 edges. This comes out to be a little less than 5 sqft. This accommodates a two plant scrog that produces 4-5oz every 3 months or so. I've been using a Galaxyhydro blurple for years now and it has performed well enough, but clearly since I purchased it there have been major improvements in LEDs. This is the light: https://www.amazon.com/Roleadro-Gal...coding=UTF8&psc=1&refRID=EHK72RMKHWG2997RP56V

I fully understand why blurples are lacking, can anyone recommend a lighting replacement with the following criteria?:
-Roughly 150watts (I run this entirely off of solar generated power, so power and efficiency is of critical importance)
-I'm comfortable with the DIY versions, but I don't have any way of measuring output. Commercial options are attractive since, hopefully, they test the lights for compliance. I don't want to build a light only to find it doesn't yield.
-I only have 28 inches of height, total. My current light is boxy and doesn't provide consistent light to the edges. Although I have limited plant size and they are close to the lights (8-10 inches), I don't have issues with light burn. A new light would hopefully be thinner, allowing it to be mounted as close to the ceiling as possible. A remote driver might gain me a few inches, which the ladies always appreciate.
-As the footprint is weird, I reasoned that a quantum type board with chips that are more spread out might be more effective in my space, compared to focused COB. If I DIY however, I might be able to strategically place chips to fit the space.

So far, I'm seriously considering:
Two HLG65 V2
One MARS
One Spiderfarm SF1000
One Timber Model 2VL

Thank you for your time
The HLG V2 Quantum boards use Samsung LM301B diodes for top shelf efficacy.
Samsung strips with the same diodes would distribute the light and heat more for a little better use of your limited vertical space.

Depending on your solar setup, it might be more efficient to power the lights directly from the battery bank with a DC to DC converter.
 
I kind of like the strip idea better now that I'm looking into it. I can build them exactly into the geometry.

My cabinet is also wood - what amperage are you running the strips at such that they can be directly mounted to the wood?

If I understand correctly, this is just a trade off of efficiency vs price - i.e I could run a ton of strips at the minimum current rating (any problem doing this?) or I could run a few strips at higher currents to save money. Though higher currents require heat dissipation. Is this an accurate assessment?

In regard to the solar, its a 48v system. I considered running directly from the DC, but it seems like the QBs run around 54v. Would a DC-DC converter step up the voltage accordingly?
 
Yes, you can buy converters with adjustable voltage and current limits. Most are step up or step down, some do both. The problem is they need a minimum voltage difference between input and output, probably a couple volts or so. I was hopping you wouldn't have a 48v system, I think it would be a problem as your battery voltage probably varies from about 50v to 56v. I think you would need lower voltage LED to use a dc-dc converter step down converter. Strips that come to mind are the Bridgelux EB Gen-3 at 19.1v and Samsung's H-influx at 22.4v.

Some dc-dc converters.
 
I kind of like the strip idea better now that I'm looking into it. I can build them exactly into the geometry.

My cabinet is also wood - what amperage are you running the strips at such that they can be directly mounted to the wood?

If I understand correctly, this is just a trade off of efficiency vs price - i.e I could run a ton of strips at the minimum current rating (any problem doing this?) or I could run a few strips at higher currents to save money. Though higher currents require heat dissipation. Is this an accurate assessment?

In regard to the solar, its a 48v system. I considered running directly from the DC, but it seems like the QBs run around 54v. Would a DC-DC converter step up the voltage accordingly?
Rather than mount directly to the wood, I'd suggest a small air gap, maybe 1/4" to 1". The Blux are a13.4 watts and the Samy's are 22.3w, about as high as I'd go without some heat sinking. Your assessment of efficiency/price is good. Strips will let you utilize more of your limited vertical space.
 
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