Rider's first foray into LED strip lighting - Samsung H Series GEN3

Rider509 said:

I'm not sure you'll hit a full 200W because as the drive current drops so does the forward voltage. Looking at the grbigger Samsung specs it looks like forward voltage at that current is about 44.5V so I'd expect to see about 174W. But I could be wrong! Someone care to chime in here?

edit: I suppose you could always slightly overdrive the strips because what the hell do we care about a 5.7 year lifespan! We'll all be onto whatever the new toys are by that time.

Click to expand...

The heatsink is 350x 600mm so I must use the 2ft. strips and wire them 4p2s.
The HLG-185H-48A can be adjusted between 43 and 53vf and delivers 4,2A max.
2 parallel cluster in series(4p2s) @4,2A(1050mA each strip)and ~50°C would need around 45,5-46v, so at 4,2A it should be ~191-193w.

But the A series Meanwells tends to give out a bit more current. A HLG-480 for instance runs stable at 550w(with 4 QB's). So, when it goes up to 4,4A it would be even more as 200w's, hopefully.

But the few watts really does'nt matters, because of the 3sft. area in which it is used, LOL!
It is very unlikely that I need it to run at full power all the time. Most of the time it's dimmed, but I like to have a bit headroom just for the case I switch into a bigger area later.

Randomblame said:

It is very unlikely that I need it to run at full power all the time. Most of the time it's dimmed, but I like to have a bit headroom just for the case I switch into a bigger area later.

Click to expand...

So kinda like this for my 4x8 tent? 2 x 600H-48A and 4 x 320H-C2100B. When I'm not growing I plan to sub it out as a crematorium.
And I get it now, Randonblame. Didn't understand that you were running them series/parallel. That'll be a nice system.

Rider509 said:

So kinda like this for my 4x8 tent? 2 x 600H-48A and 4 x 320H-C2100B. When I'm not growing I plan to sub it out as a crematorium.
And I get it now, Randonblame. Didn't understand that you were running them series/parallel. That'll be a nice system.

Click to expand...

Yeah, I see you!
Be careful, a few watts more and you materialize on the Enterprise next time you step under the "Beam", Scotty.

Rider509 said:

So kinda like this for my 4x8 tent? 2 x 600H-48A and 4 x 320H-C2100B. When I'm not growing I plan to sub it out as a crematorium.
And I get it now, Randonblame. Didn't understand that you were running them series/parallel. That'll be a nice system.

Click to expand...

How many strips are you going to be using in your 4x8?

Rider509 said:

I have a hard time putting full blind faith in LEDGardener's calculator because I can't see what's happening in the background of his protected spreadsheet.

Click to expand...

I mostly just pick numbers that speak to me. Like, on a particular day, I might be really feeling a “4” vibe, so I’ll throw that into a few cells.

For real though, I used the Samsung calculator to determine the Vf that the LM561C's will have at various levels of current, then multiplied that by however many diodes are in series in each type of strip. For the EB strips, I digitized the Vf-Current graph from the datasheet to derive these voltages.

This table represents 25, 50, 75, and 100% of current (e.g. "25C") and the associated voltages at these currents (e.g. "25V") at a standard temperature.

Once you select how hard you'll drive the strips, the calculator takes the corresponding values for the strip you have selected and multiplies them by your quantity. Lumen estimates were easy for the LM561Cs since the Samsung calc spits them out. Estimates for the EB strips were extrapolated based on the data provided in the spec sheet.

As you can see in the attached table, I'm not sure which diode they're using on the EB strips and despite trying to make the numbers jive for a bunch of different Bridgelux diodes using their product simulator, I couldn't nail down which one in particular they're using. If anyone knows which one they use, I'd love to know too - it'd save the work of digitizing the graphs if I could just use their simulator instead.

@ledgardener Thanks for the explanation!
A stupid question but I'm trying to work out which driver I should use for a 1 strip veg light. Obvs series/parallel doesn't come into it with 1 strip but I'm assuming your calculator will still give me the correct answer? I'm planning to use 1 FB22B 5000K. The veg cab is 1200mmx1200mmx600mm (LxHxW)
Thanks man!


EDIT: Driven at 100% the driver is given as HLG-100H-48.

ledgardener said:

For real though, I used the Samsung calculator to determine the Vf that the LM561C's will have at various levels of current, then multiplied that by however many diodes are in series in each type of strip. For the EB strips, I digitized the Vf-Current graph from the datasheet to derive these voltages.

This table represents 25, 50, 75, and 100% of current (e.g. "25C") and the associated voltages at these currents (e.g. "25V") at a standard temperature.

Once you select how hard you'll drive the strips, the calculator takes the corresponding values for the strip you have selected and multiplies them by your quantity. Lumen estimates were easy for the LM561Cs since the Samsung calc spits them out. Estimates for the EB strips were extrapolated based on the data provided in the spec sheet.

As you can see in the attached table, I'm not sure which diode they're using on the EB strips and despite trying to make the numbers jive for a bunch of different Bridgelux diodes using their product simulator, I couldn't nail down which one in particular they're using. If anyone knows which one they use, I'd love to know too - it'd save the work of digitizing the graphs if I could just use their simulator instead.

Click to expand...

Will you be adding the LM301b used in newer Q series ?

ledgardener said:

I mostly just pick numbers that speak to me. Like, on a particular day, I might be really feeling a “4” vibe, so I’ll throw that into a few cells.

Click to expand...

OMG, I haven't laughed so hard in forever! So glad I didn't have a gulp of coffee in my mouth!
I kinda figured that might get your attention, ledgardener. (insert evil grin) You know I love your work, I just wish you'd unprotect your Excel workbook so others could build on your valued efforts. (translation: I want you to spoon-feed me)
Open source promotes future development. And a wise man once said, "Give a man a lighting calculator and he can design a system. Teach a man how to make a lighting calculator and he"... oh hell, I forget the rest.

Eph3m3raL said:

How many strips are you going to be using in your 4x8?

Click to expand...

My old system on one side of the tent is four groups of 3590s, each on a 320H-C2100B. The new one is two groups of four FB24Bs, each on a 600H-48A. I know it's overkill, but it kinda future-proofs my driver purchases.
The group of eight 5000K HB22D strips went to my tattoo shop to replace ancient 8' T-12 fluorescents.

Since, legally, I can only grow six plants without registering with the state (which entails giving up my ability to carry concealed or make future handgun purchases) I'm going to run both FB24B systems with two 3590 systems between them so each system is covering a 2x4 area.

Is 1 5000K FB22B in a 4x2 veg cab sufficient/suitable?

Stone_Free said:

Is 1 5000K FB22B in a 4x2 veg cab sufficient/suitable?

Click to expand...

I am just leaning about this stuff, but 1 is only 50 watts.

I am building fb22b's strips for my 4x4 tent. I will eventually eliminate my HPS. Starting with 6 vertical strips and working my way up to 12-16 strips total

https://www.rollitup.org/t/help-me-build-4-vertical-strips-for-my-tent.953004/

Sour Wreck said:

I am just leaning about this stuff, but 1 is only 50 watts.

Click to expand...

If I turn the power up it is closer to 100W I believe.

Stone_Free said:

Is 1 5000K FB22B in a 4x2 veg cab sufficient/suitable?

Click to expand...

I'd have to say no. Four would work if driven to about 1400mA.

Stone_Free said:

If I turn the power up it is closer to 100W I believe.

Click to expand...

You could take it right to design limits but that's still less than 25W per square foot. And the harder you drive them the more of that wattage is converted to heat rather than light energy. When I turn my system up there's a noticeable point where the light output plateaus to the eye. I haven't run PPFD tests to see what that looks like to the plants.

Rider509 said:

I'd have to say no. Four would work if driven to about 1400mA.

Click to expand...

Shit! Building a veg and flower lighting rig is getting expensive! I might go for the Bridgelux EB strips to cut the cost a little.....
Thanks for your help

Rider509 said:

the harder you drive them the more of that wattage is converted to heat rather than light energy

Click to expand...

Yeah, that's true. I'll have a rethink! Thanks buddy.

Stone_Free, on your cold, damp, and dark island the extra heat might be a good thing!

Stone_Free said:

@ledgardener Thanks for the explanation!
A stupid question but I'm trying to work out which driver I should use for a 1 strip veg light. Obvs series/parallel doesn't come into it with 1 strip but I'm assuming your calculator will still give me the correct answer? I'm planning to use 1 FB22B 5000K. The veg cab is 1200mmx1200mmx600mm (LxHxW)
Thanks man!


EDIT: Driven at 100% the driver is given as HLG-100H-48.

Click to expand...

Yup, it'll work for 1 strip. I see further on in the thread that you'll be using more than 1 though anyway - I'm with Rider: I'd do 4 of those in that space.