some Brainfood for this Statement...But... I'm still a bit unsure about the accuracy of output calculations for these whites, the spectral output charts are same for many colour bins, that just isn't possible.
have them only for Windows.Any recommendations for preferably open source linux software that can handle those simulation files?
There isn't really a lot of labor involved in assembling the lamps. Mounting the LEDs on the boards is an automated process, which means you just need to install the boards, mount drivers and solder wires to the LED boards or attach connectors. It really isn't rocket scienceSorry- I meant do you suppose that these companies that make LED panels. The good ones, I mean, do you suppose they're profitable selling their LED panels. Like Area 51 or UFO. Just was curious.
Currently.. slow I'm still studying (MSc.EE) and I work a lot as well, with sharp deadlines and tons of data to process.Any progress with that spreadsheet JMD? In the meantime, tried to do some rough estimates for the hans (ledgrow.eu) panel. Assuming 700mA drive current, 50C junction temperature, 550mW bin XT-E's, 720mW rebels:
@ 56W ~1.66PPF/W
@ 65W ~1.43PPF/W
If upgraded with XP-E2 P3, ~28% addition or
@ 56W ~2.13 PPF/W
@ 65W ~1.83 PPF/W
Quite nice performance, even with such old chips. Estimates might be rough, but couldn't stop wondering - at least the proportions vs. later XP-E2 should be right.
Sorry, just some random ramblings. Just wondering what can be done, when we have cheap chips with similar performance as XM-L2 or oslon hyper red 3T-4T driven at 350mA.. 2.5+ PPF/W.
edit: Thanks again guod! Need to learn to use wine or VM, or maybe grab some old junk pc with windows..
Good luck with the studies! I think that is a more important goal to pursue too. Not that deeper understanding of LED technology is bad for your career, but first things first.Currently.. slow I'm still studying (MSc.EE) and I work a lot as well, with sharp deadlines and tons of data to process.
The less time I need to spend on acquiring information, the more time I can spend on making the spreadsheet - so if you don't mind, please send me a walk through of how you calculated the PPF.
Do you have any idea on how to calculate the output in YPF/PPF/µmol when the datasheet only provides lumen?
Yes the Hans panel leds are driven at 700ma,
it's 56w for the leds , 65w total from the wall. As you know Drivers are not 100% efficient it consumes 8-9w.
Who doubts you?......damn I forgot about the fan! Lol, yeah I think Hans said around 1 watt or so idk.Question here is "what drives the fan?".... 12V / 100mA
i think 600mA for the blue leds + 100mA for the fan
700mA for all reds.
my version for this schematic of the Hans-Panel
View attachment 2773571
Less photons, but ones with more energy.Who doubts you?......damn I forgot about the fan! Lol, yeah I think Hans said around 1 watt or so idk.
Always wondered why he would drive them all at that ma, but your schematic makes sense as blues put out more energy /photons(knna) vers the reds@the same ma.
Lol he did add two white leds, well shows you how much I know.......very littleHans updated his site, he uses Cree XB-D for new leds, too bad he does not reveal the bins used. Overall I think this XB-D is Crees "budget" lineup of emitters, little lower output of whites for example. Reds should have similar output as XP-E2, little cheaper price, but at least yet you can't buy the best bin in only couple of pcs, only bigger amounts available at mouser. In bulk reel amounts, red XB-D are under 1 euro per emitter
edit: Checked the difference with the cree tool guod posted, yes, there is a small difference in efficiency between XP-E2 and XB-D in reds, but VERY small.