widmer
Drug Enthusiast
You're keeping in mind that 7-ups have a combo of 4 XPG's and 3 XPE's? So a person could really drive two of these with an eln-60-48?
DIY LEDs - The write-up
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You're keeping in mind that 7-ups have a combo of 4 XPG's and 3 XPE's? So a person could really drive two of these with an eln-60-48?
widmer
Drug Enthusiast
Also, is anyone aware of any 3rd party testing of the actual spectrums that come out of these LEDs? The datasheets look wayyy too much approximated. I would be worried that in order to increase efficiency of the white XP-G's, they might be pulling some sort of thing like increasing a particular yellow wavelength, sort of in the way that high pressure sodiums get super efficiency and it's mostly yellow light.
Skeptic_07
New member
yes, dont confuse XPE with XRE like i had done.. they are different! white XPG has fV of 3.3 @ 1000ma and royal blue XPE has fV of 3.5 at 1000ma (which you should not be running at anyway so the actual fV's should be lower in practice)
Skeptic_07
New member
Has anyone considered using elliptical optics?
I searched high and low to find beam shots for these elliptical optics from carclo and this thread is all i could find. The thread is pretty old, but it shows alot of beam shots, including on optical one, a 25x6 degree. I wonder what this optic's beam shot looks like and how it can be compatible with both MCE and XPG. That doesn't make sense to me because they two types are very different in size.
I searched high and low to find beam shots for these elliptical optics from carclo and this thread is all i could find. The thread is pretty old, but it shows alot of beam shots, including on optical one, a 25x6 degree. I wonder what this optic's beam shot looks like and how it can be compatible with both MCE and XPG. That doesn't make sense to me because they two types are very different in size.
der_wille_zur_macht
Team RC
I wonder what this optic's beam shot looks like and how it can be compatible with both MCE and XPG. That doesn't make sense to me because they two types are very different in size.
Those opitcs are essentially bare lenses that you clip into holders. the holders are designed for the specific LED.
stugray
Premium Member
I stumbled across these but havent dug in very deeply:
http://www.luminus.com/content1454
"With superior lumen output ranging from 1,750 lumens for the CBT-90 and exceeding 4,000 lumens for the CBM-360"
And "Has anyone considered using elliptical optics? " - YES!
Especially after looking at some of these higher output LEDs.
I would love to be able to do my 125 G with only 10-20 LEDs instead of 200.
Stu
http://www.luminus.com/content1454
"With superior lumen output ranging from 1,750 lumens for the CBT-90 and exceeding 4,000 lumens for the CBM-360"
And "Has anyone considered using elliptical optics? " - YES!
Especially after looking at some of these higher output LEDs.
I would love to be able to do my 125 G with only 10-20 LEDs instead of 200.
Stu
sammy113
New member
I have a Weller from Home Depot for $20 So far, the best I have used. Very constant with temp and melts super fast. The tip is very messed due to usage and cannot find one to fit. Bought a 40W solderin iron from radio shack and it sucks. Also bought a soldering station from www.mpja.com rated up to 50W with adjustable temp and also sucks (the one from the specials at$14.99). I stick to the weller even with the f***ed up tip.
der_wille_zur_macht
Team RC
A quick look at their datasheet has me scratching my head:
Do I really have to do the math to figure out the REAL efficiency?
What's the model number? Weller tips are usually pretty easy to get. . .
sammy113
New member
Model is: SP40LK. Found tips for the 60,80 and 100w models but don't know if it fits. Will have to verify the diameter of the tip when I get home.
widmer
Drug Enthusiast
I'd be interested if you did :lmao:. It's interesting how they are totally different in input characteristics ie something like 5 volts and 5 amps...and Stu has a point as far as just using a few LEDs vs dozens. However, if the efficiency is garbage then that's a dealbreaker...
customcolor
New member
get a metcal soldering station!! i just soldered up my 48 with mine and 3 seconds is all it took per solder to the star! heats up in like 5 sec and you can get a ton of tips...my wife uses them at where she works and they build ultra sounds and military electronics...aka very high grade stuff!!
on a different note...like i said i finished up my 48 array and HOLY COW!!! i used 60 degree optics on q5 bin crees and that little set up blows a 175w halide out the water!!!!! its very crisp white...now i wish i would have gotten the dimable drivers so i can take some white out of the mix....when i get going i will be replacing my radiums with leds and a controller.
LEDS ROCK!!!
der_wille_zur_macht
Team RC
I randomly picked one model, found the "current density" spec as noted above, the area of the chip, the Vf, and the lumens of the highest bin, and it actually worked out to around 100 lumens/watt at the most efficient current, which isn't that bad - on par with a Q5 XR-E. Of course that was late at night after a glass of wine, so who knows if my math was good. :lol: Might go through and do it again today. Though, pricing will also play a role, of course.
For people who want to do a highly concentrated spotlight build like yours, I could see something like these making sense, but otherwise, I think we'd be past the point of no return on the spectrum of lots of light from a small number of devices vs. a little bit of light from a large number of devices, even with correct optics. If one of these things is equivalent to, say, 8 XR-E, you're going to be getting ALL that light (and heat) from a single tiny point, which is going to be a challenge to manage IMHO.
der_wille_zur_macht
Team RC
Thanks Soundwave. Amazing to see that the tank is doing so well. That orange cap in the lower right has exploded! Same with that twiggy green SPS in the middle!
Skeptic_07
New member
use two AA batteries.. the voltage on a 9v is wrong.
der_wille_zur_macht
Team RC
A 9v battery attached to one of these LEDs would fry the LED in a millisecond and probably cook the battery if you managed to step the voltage down (9v batteries can't take much current at all). Two AA's is fine, but only test briefly, especially if the MCPCBs aren't attached to a heatsink.
Even one AA will tell you that the LED is fine. It won't provide enough voltage to actually light the LED, but it'll cause the emitter to gently glow if it's good.
Even one AA will tell you that the LED is fine. It won't provide enough voltage to actually light the LED, but it'll cause the emitter to gently glow if it's good.
Reef_Matrix29
Water Lover
Soundwave, so did your SPS start to grow better after they got use to the LEDs? Great looking tank by the way.
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