Confirmation of Build / layout

[demoneye]

Hi

I'm looking to build a grow light for an area of 1.5m x 0.8m.

I'm intending to build it with 22 x LT-F562B (2' Samsung SI-B8U261560WW) and I'll be driving it with a Meanwell HLG-480H-24B.

I've used the panel building tool on the site and it says this combination will work - can someone confirm this?

Do I need to add aluminum heat sink channel to the strips - I've seen some builds with no heat sinks at all - maybe just aluminum strips on the back?

Also, I need decide on how to layout the LEDs - attached sketch shows a couple of layout - any advice?

Thanks in advance...

[Professor Xavier]

B certainly looks like it will give you more uniformity. One thing Sdfoster on this site got me thinking aboot was splitting up a fixture into say 2 luminaires. That gives u the ability to have different hanging heights for different strains or even phenotypes that aren't feeling particularly conformist in their grow heights.

[demoneye]

... splitting up a fixture into say 2 luminaires ...

The guy I'm building this for has grown the same strain for about 8 years now, so can't see him changing anytime soon.

I've already got to build the array so it can be split into half for transport - luckily I know an engineer who's going to be milling me some custom joiners so I can join the 3/4"X3/4"X1/8" frame with a simple slide together...

[unkle_psycho]

Attaching the strips to the frame is all the heat-sinking most people need. Finally its all aluminium, so it becomes a question of surface volume.

Are those the 2 foot strips with a single line of diodes? How many % from max? If its around 10w per foot you won't need much heatsinks.

[demoneye]

Are those the 2 foot strips with a single line of diodes? How many % from max?

2' strips with single diode line. Will be running at 50%

This is going to be an 80% saving on U channel

[unkle_psycho]

Running at 50% you will be more then fine with the U-channels. Even flat bars would work at that power, but the more the merrier.

I made my first fixture with bridgelux vestas, I'm feeding 19w per foot with heatsinks equivalent to u-channels. They run cool. For my last two builds I just sprayed the back of the strips with a copper adhesive and stuck 40cm long strips of aluminium baking foil that I folded over itself. At 12.5w per foot they are absolutely cool. Was thinking of playing around and testing the limits of the foil-sink.

Here any decent heat-sinks cost more then strips, so it seems the universe wants me to study ghetto builds with high strip counts and creative cooling

[Professor Xavier]

At that price, it must be tempting to look at what a 3D printer could do for you Unkle_Psycho.

[demoneye]

At that price, it must be tempting to look at what a 3D printer could do for you Unkle_Psycho.

I've got a 3D printer and will be using it to make Wago mounts and wiring guides for the build.

[Professor Xavier]

At that price, it must be tempting to look at what a 3D printer could do for you Unkle_Psycho.

I've got a 3D printer and will be using it to make Wago mounts and wiring guides for the build.

Making some popcorn. I've got an interesting build to follow.

[demoneye]

I've bought a "B" model power supply to allow for dimming when working under the lights.

What size potentiometer should I be looking for - 100k correct?

I remember my last build I added a resistor into the dimming circuit so there was always a little bit of resistance when the dimming circuit was switched on - any idea?

When the dimming circuit was off, the dimming wires were left open.