Bridgelux EB Series Build
- Thread starter brahbbyB
- Start date
PicklesRus
Well-Known Member
That's in the open
I should hang it in a totally dark room and get the readings.
I should hang it in a totally dark room and get the readings.
BuddyColas
Well-Known Member
That's first rate! Thank you.
My take-aways: If you want it even on the edges, put it in a tent with reflective walls. And if you want more photons, add more bars. Gives me a much better idea what to expect.
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PicklesRus
Well-Known Member
my ambient light is like 9umol
The bars are like the picture. two on each side and the middle ones evenly spaced - if I was to put the meter directly underneath the bars at 4" i get a much higher rating...
Awesome! Thanks for getting that done! I have mine spaced at 2.5", what were yours at?
PicklesRus
Well-Known Member
Mine are spaced evenly over the entire 2'x4'
PicklesRus
Well-Known Member
I have four more strips. When I get a second driver I'll be able to show you 8x @ 700ma
With your data at 9" above canopy PF/W = 1,77 umol/J
This means that Brigdelux diods is not as efficient as Samsung.
Samsung M series have the same lumens output but i believe their LM561B plus SMD leds have a higher QER and lower LER. Which means overall PAR output is slightly higher.
LM561B plus LER and QER is probably the same as LM561C as these was released at the same time.
QER = 4.86
LER = 321
Samsung M series = 151lm
151/321 = 47% efficiency.
4,86 x 0,47 = 2,28 umol/J
Driver loss 7% = 2,28 x 0,93 = 2,12 umol/J
Samsung M series have the same lumens output but i believe their LM561B plus SMD leds have a higher QER and lower LER. Which means overall PAR output is slightly higher.
LM561B plus LER and QER is probably the same as LM561C as these was released at the same time.
QER = 4.86
LER = 321
Samsung M series = 151lm
151/321 = 47% efficiency.
4,86 x 0,47 = 2,28 umol/J
Driver loss 7% = 2,28 x 0,93 = 2,12 umol/J
BuddyColas
Well-Known Member
I follow your math for the M-Series strips, but why do you say the EB series is less efficient?
At 3000K the M-Series is 151lm/watt and the EB is 156lm/watt. I know at this test the M-Series is using 2.6 watts more, but that seems relatively negligible.
You're right, It probably has the same effciency but gives out less PAR. Would be so much easier if they had an calculator on their website as Samsung does.
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PicklesRus
Well-Known Member
I thought we already knew the Samsung was better (but twice the price..?)
https://www.arrow.com/en/products/si-b8t341b20ww/samsung-electronics
Same price as Bridgelux EB series
muleface
Well-Known Member
it seems to be putting out less light per strip, so you would need to get 3 of them vs 2 of the bridgelux. or am i looking at that wrong
muleface
Well-Known Member
this was just for fun...
to get 100k lux you would need 20 samsung strips and 12 Bridgelux.
it would cost you $573 to run the samsung and $654 to run the bridelux
so the savings on running samsung over bridelux at 100k lux is $81 (at .10 a kwh)
the cost to buy @ $14 each so it would cost you $280 to buy the sumsung and $168 to buy the bridgelux
so the savings $112 to go with the bridgelux
with that said the break even point is 18 months. Then the samsung would start to cost less.
The samsung would probably have better coverage also, as you would need 20 light strips instead of 12.
But in 18 months, this will be old news and someone will have something we want to throw money at instead.
So i would say, its a personal judgement call on this, it don't think it really matters much
to get 100k lux you would need 20 samsung strips and 12 Bridgelux.
it would cost you $573 to run the samsung and $654 to run the bridelux
so the savings on running samsung over bridelux at 100k lux is $81 (at .10 a kwh)
the cost to buy @ $14 each so it would cost you $280 to buy the sumsung and $168 to buy the bridgelux
so the savings $112 to go with the bridgelux
with that said the break even point is 18 months. Then the samsung would start to cost less.
The samsung would probably have better coverage also, as you would need 20 light strips instead of 12.
But in 18 months, this will be old news and someone will have something we want to throw money at instead.
So i would say, its a personal judgement call on this, it don't think it really matters much
No you are counting wrong. Look again.
muleface
Well-Known Member
which part?
Samsung M series 1120mm = 33.6W 4000K 158 lm/w
Bridgelux EB 1120mm = 31W 4000k 159lm/w