Bridgelux EB Gen 3 High Output 4ft Strips

[MidnightSun72]

Id assume the H.O. has a better quality strip, layers, copper, etc... Everyone has said the regular strips felt under rated and could handle more with heatisink, so the H.O should have a better quality strip to handle an increased nominal power without external heatsink. If you want to push them to max then you will need sinks. From what I'm gathering these strips are basically rated at 2x the power of a regular strip so I would be willing to bet that each strip running at nominal power running without sinks would put off similar heat.

That being said ill have to check led count/specs to make sure there is no other difference between.. If that is the case you should calculate buying reguluar gen 3 strips and adding a quality heatsink vs the HO with heatsink... Only difference I can think of is a higher quality strip transferring the heat better to the sinks... So if H.O. with sinks can handle 2x power of a regular strip, I would assume a regular strip with sinks can handle 1.5x its rated max. Not sure I would want it running 2x its max as the core of the strip is probably inferior...

On a side note I am high and have had a few drinks. After all the posts I have read this is what makes logical sense to me but i obviously dont have both strips in front of me to confirm. That being said i wish I could put a few bucks towards a pot that runs these kind of tests for us vs all of us figuring it out on our own... way to much money wasted that way..


edited to add "dont have" instead of "have" towards the end

How does one check the diode counts to be sure the voltage and amperage is suitable for the heat dispersion? Basically I think they are running double the diodes and double the current and same voltage. So it's like 2 normal 4ft Gen 3 strips in parallel to equal 1 gen 3 HO.

 

[UpstateRecGrower]

I run bridglux gen 2 4’ strips on 1/8” aluminum angle at 40 watts each, I can’t get much wattage out of the drivers Because they’re 36v tho or I’d be running a little more, my next set up with be the gen 3 Strips with 42a’s

 

[babybud]

How does one check the diode counts to be sure the voltage and amperage is suitable for the heat dispersion? Basically I think they are running double the diodes and double the current and same voltage. So it's like 2 normal 4ft Gen 3 strips in parallel to equal 1 gen 3 HO.

i meant comparing one strip to another by literally counting led's... What is the temperature of the regular and h.o. strips at nominal power?

 

[MidnightSun72]

i meant comparing one strip to another by literally counting led's... What is the temperature of the regular and h.o. strips at nominal power?

Both data sheets list 25*C at their respective nominal currents.

EB GEN 3


EB GEN 3 HIGH OUTPUT

 

[babybud]

Well sh*t, if we have people running the regulars at nominal with no issues then im not sure why your h.o's would be any different if test says same temps...

 

[MidnightSun72]

Well sh*t, if we have people running the regulars at nominal with no issues then im not sure why your h.o's would be any different if test says same temps...

That was my original thinking and why I bought thein the first place.

But I understand the other view point which is the 4000lumen strips run at 27w in 1x44" strip. And the 8000 Lumen HO strip is 53w in a 1x44" twist the heat generated in the same amount of area.

and also I tend to think Bridgelux might control the temp of their strips someway during testing to standardize the results. I have no idea if they mount it to a cooling device during their tests or what etc.

 

[Rocket Soul]

The datasheet is not listing tests for temps in this case, its a pulsed measurement of output where they notmalised temps at 25c.
Running the diode at twice as hard is going to get them hot. My best guess: the high output bxebs either have twice the amount of diodes (better) or double diodes that can be run twice as hard (worse for thermals). But no matter what, they are going to be running hot at +25w per 2 foot bare section, no matter what the datasheet says. This is easily confirmed by testing your strips at 1400mA, but be careful you may end up frying the strip if you go long enough.

 

[MidnightSun72]

The datasheet is not listing tests for temps in this case, its a pulsed measurement of output where they notmalised temps at 25c.
Running the diode at twice as hard is going to get them hot. My best guess: the high output bxebs either have twice the amount of diodes (better) or double diodes that can be run twice as hard (worse for thermals). But no matter what, they are going to be running hot at +25w per 2 foot bare section, no matter what the datasheet says. This is easily confirmed by testing your strips at 1400mA, but be careful you may end up frying the strip if you go long enough.

I think normal 4 ft strips have 112 diodes (eb gen 2 4ft do according to ledgardener.com . These strips have 14s x 16p printed on them. So that's 224 diodes right?.


but then again the 4ft gen 3 shoes the same on the data sheet. So maybe they are driving the diodes twice as hard in this case.

 

[Rocket Soul]

I think normal 4 ft strips have 112 diodes (eb gen 2 4ft do according to ledgardener.com . These strips have 14s x 16p printed on them. So that's 224 diodes right?.
View attachment 4731629

but then again the 4ft gen 3 shoes the same on the data sheet. So maybe they are driving the diodes twice as hard in this case.
View attachment 4731645

Im pretty sure that all of the gen3s is aprox 2 diodes per cm, so the 224, or something like that seems likely. The diodes driven twice as hard is going to get aprox twice as hot. Id say its likely a bug in their datsheet. The fact that they/blux havent got back about the query re this would increase the likelihood

 

[MidnightSun72]

Just got the results for the heat sink simulation back. So 4 fins seems to do the trick.


I told them to keep case temps down to 65*C to be sure it was conservative.

 

[Rocket Soul]

Just got the results for the heat sink simulation back. So 4 fins seems to do the trick. View attachment 4731682
View attachment 4731683
View attachment 4731684
I told them to keep case temps down to 65*C to be sure it was conservative.

How much for those heatsinks? If the sinks cost more than what the strips cost id just buy 2 strips instead of strip + sink.

 

[MidnightSun72]

How much for those heatsinks? If the sinks cost more than what the strips cost id just buy 2 strips instead of strip + sink.

I'd likely return the strips and get the 4000lm strips. Because @.7a somehow they both would produce only 4000lumen. Yet the 4000 Lumen eb gen 3 are cheaper than the HO strips. Same number of diodes. Same lumens basically at 0.7a. How does that make sense?

 

[Rocket Soul]

It does not. I think you should do a return, i dont think you got what you ordered and i dont think that what you ordered is what you need. But god knows...

 

[MidnightSun72]

Ok so filed for a return $8 return shipping to the US hoooow??? anyway lol.

Also got pricing on the Gen 3 Thrive, Gen 3 slim and Gen 2. Digikey dont sell the Gen 3 1120X24mm strips at all even though future electronics do. Price on the sliims is good though. Thrive are 14.40/strip lower lumen/w. Slims are 11.21/strip and the Gen 2s are 10.66 per strip and wont be in until dec 4th or later. only 100 thrive strips in stock and the slims are alllll in stock.. so I am leanign to 100% slims but that sucks cuz they are 1190mm which means any fixture i make will be longer and i cant swap out to similar size strips. But I will figure a way around this. One thing I like about the slims is that there are lots of cheap let heatsinks/eclosure available for that thin width of a strip

 

[Rocket Soul]

Ok so filed for a return $8 return shipping to the US hoooow??? anyway lol.

Also got pricing on the Gen 3 Thrive, Gen 3 slim and Gen 2. Digikey dont sell the Gen 3 1120X24mm strips at all even though future electronics do. Price on the sliims is good though. Thrive are 14.40/strip lower lumen/w. Slims are 11.21/strip and the Gen 2s are 10.66 per strip and wont be in until dec 4th or later. only 100 thrive strips in stock and the slims are alllll in stock.. so I am leanign to 100% slims but that sucks cuz they are 1190mm which means any fixture i make will be longer and i cant swap out to similar size strips. But I will figure a way around this. One thing I like about the slims is that there are lots of cheap let heatsinks/eclosure available for that thin width of a strip

The slims are not that great, i didnt like to work with them: first they are flimsy as fuck, no point in even thinking about using these without a heatsink. Also, they dont have mounting holes, only notches. Second, they run hotter than the regs.
Id only use slims if you were really limited with space/width or needed insane diode densities.

 

[MidnightSun72]

The slims are not that great, i didnt like to work with them: first they are flimsy as fuck, no point in even thinking about using these without a heatsink. Also, they dont have mounting holes, only notches. Second, they run hotter than the regs.
Id only use slims if you were really limited with space/width or needed insane diode densities.

That's kind of surprising. Other than the lower surface area you think they'd be pretty similar to the eb Gen 2 a having a newer more efficient diode and driven at similar amps and voltages.

 

[Rocket Soul]

They are very slim... Less pcb means higher temps. The gen2 are same pcbs as the regs eb gen3

 

[MidnightSun72]

They are very slim... Less pcb means higher temps. The gen2 are same pcbs as the regs eb gen3

Just priced the normal Gen 3 4ft from Future electronics and it's $11.31/strip. But they only have like 19 of the 3.5k So they will get back to on lead time from factory.

 

[UpstateRecGrower]

I'd likely return the strips and get the 4000lm strips. Because @.7a somehow they both would produce only 4000lumen. Yet the 4000 Lumen eb gen 3 are cheaper than the HO strips. Same number of diodes. Same lumens basically at 0.7a. How does that make sense?

The high output would have more light at .7a because they're more efficent.

 

[MidnightSun72]

The high output would have more light at .7a because they're more efficent.

What are you basing this claim on?

Below chart from the data sheet shows 50% of the flux at 0.7a. Therefore exactly the same as the Norma output 4ft strips. Same number if diodes too.