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cheap LED sources Answered

Hey everybody,
I've been looking for a good source for cheap LEDs for a project I'm working on. I want to replace 14 different 60W halogen bulbs with home-built LED lights. The reason for home-built is that the halogens burn out like crazy, but the light fixture looks nice, and isn't going to be replaced. The halogens put out an estimated 500-700 lumens (from the google research I did)

So....
I'm looking for the best deal for white leds per lumen. the best deal I've found so far is:

http://www.phenoptix.co.uk/Ultra_Bright_White_SUPERFLUX_LEDs_3000mcd_p/whi-flux-3000.htm

at .021cents/lumen from the brightness calculator http://led.linear1.org/lumen.wiz

but considering the quantity I want.... there's not even enough room to fit those LEDs on the fixture (due to the large case size)

or if I buy 1000 of them (about the quantity I'm looking for) I'd be getting a slightly better deal, but still coming in at $120, not to mention they still don't fit.

The physical space for the leds is a cylinder with a diameter of about 30mm and a height of about 70mm.

Any Ideas/suggestions for cheap white LEDs?

Thanks!
-Zaen

Discussions

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jeff-o

9 years ago

I usually get my LEDs from eBay, from the "Light of Victory LED Store" They ship from Hong Kong and I've bought thousands of LEDs from them so far (though I haven't used them all yet!)

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Zaen

9 years ago

For those of you who search this topic, I ended up going with an ebay retailer. Ebay might not provide the most information for their products, but in terms of price, it's hard to find better. If you're looking for specific ebay retailers, I don't have any recommendations (I don't even remember who I ended up from). I'd suggest looking to recent instructables involving LEDs, and look at their sources. Hope this helps somebody else! -Zaen

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wadodont

9 years ago

dealextreme.com are good for people who need LEDs with cheap international shipping. Have a look in this category: http://www.dealextreme.com/products.dx/category.917 . All their prices include shipping. Shipping can be fairly slow and you can't always trust that the specs are correct, however.

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Padlock

9 years ago

Ebay is your friend.

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guyfrom7upPadlock

Reply 9 years ago

second! always buy my LEDs there, have bought about 400 now with 0 probelms I think out of all of those only 2 were not functioning

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Zaenguyfrom7up

Reply 9 years ago

Again, which seller did you get yours from? or do you just search in general? I think I might just try to spend some time on ebay to see what deals I do find.

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PadlockZaen

Reply 9 years ago

Uh... I really don't have one seller I buy them from. I just search for what I need and buy the cheapest. But usually I buy from stores in China. I find they're the cheapest. If you want them pretty soon, then go for someone in the US. I ordered mine and about 3 weeks later it came.

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ZaenPadlock

Reply 9 years ago

Do you have any ebay sellers in particular you like to use? I have one, but the LEDs I get from that seller are pretty dim for actual light output. 16000 mcd, but only about 10-15 degree viewing angle.... Thanks.

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Slisgrinder

9 years ago

sorry to double post, possibly high powered led's if at all available...

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Slisgrinder

9 years ago

Sorry to divert, but any cheap led sources that ship or reside in canada?

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killerjackalope

9 years ago

Hey I've been considering a similar project, our house is full of the blighters and they're a nuisance to me, my other option for my own room is to add normal sockets and add some interesting shades to have a cool lighting system that's all CFL instead, because it's so many lights I reckon really low wattage ones are best, in my eyes I'm wasting 250watts of electricity running them, to replace them with CFL would bring that down by 150watts, there are some great 'ibles on using LEDs with mains electricity, as an american you'd have half the work I have, I've got 240V mains, you've got 110V mains, which makes a difference when it comes to the number of LEDs to fill the quota easily, granted I could use something else like a step down transformer... For price reasons I'd suggest going for lower brightness LEDs since you're only looking to replace 700 lumens max, normal bright LEDs will work fine without spending the money on high power ones. Also consider colour, warm white LEDs are preferable to alot of people, personally I like full spectrum light better so the cool white are fine to me. As for it being AC, you can either rectify or use the fact that they're Diodes to your advantage, having to sets "pointing" opposite directions for light with zero flicker. A Good way to save space would be to work out a clever circuit arrangement, a common anode or cathode would really help, maybe a cylinder shape designed to fit with a negative outside and a positive pole down the middle, that might help with size issues, then you just need a way of reflecting it all down effectively.

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Killa-Xkillerjackalope

Reply 9 years ago

This depends what how many you want. MPJA is a good site, BUT! $15 min. buy limit to order. You can get 100 of those 3mm LEDs for like a dollar. Not sure the prices on the 5mm high power ones but.. I havn't checked this but, whats digikey selling for the prices? They have a massive list of parts, they must have what you want xD

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killerjackalopeKilla-X

Reply 9 years ago

Another point to add... Ebay should have an eye kept on it for stuff, some people make money by taking much larger shipments of components and selling them with a lower markup than a distributor, the downside being that you'll have to figure out who's who...

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Zaenkillerjackalope

Reply 9 years ago

Sorry for not getting back sooner, thanks for the comments. I plan to just do a straight 1:1 coil, with a dc rectifier, an a capacitor. Between the fact that I'll need a current limiting resistor and the number of LEDs I plan to use, I should be ok. Killa-X: MPJA doesn't seem to have any spec sheets, so you can't really tell the light output. I did try digi-key, unfortunately they actually don't have very good deals on LEDs. And yeah, I think ebay might be my best bet in terms of pricing, assuming I can fin enough information on the LEDS. If you do see any good deals on cheap white LEDS, I'd still love to hear about it! Thanks, -Zaen