Lighting New driver for a UFO

[Wienerwoods]

I'm looking to replace my factory driver on my (supposedly) 50x3W LED UFO and I wish to receive as many opinions as possible so I won't waste money only to destroy the light.

The light can only accommodate one driver and I was thinking about getting this one: http://www.dx.com/p/1-7a-60w-power-constant-current-source-led-driver-85-265v-47305#.VMzv-MmOcQE

My current driver looks like this so I think it is a constant current, only a smaller one:

It draws a puny 30W and I would like at least 50W.

I've tried to do research on the subject but I cannot for the life of me figure out how the light is set up (series, parallel... series in parallel...) and how the driver voltage and current must be calculated... Should've paid more attention at school. :slaps:

Help?

 

[GoeRilla]

That one is too big. You must not go over 0,7A.
You can find many 650 mA drivers in China or better a Meanwell driver. They also comes
in versions where you can adjust the current.

Rilla.

 

[Wienerwoods]

That one is too big. You must not go over 0,7A.
You can find many 650 mA drivers in China or better a Meanwell driver. They also comes
in versions where you can adjust the current.

Rilla.

I hate to be a burden but I cannot find one that is rated at 50 or more watts. Can you?

 

[pop22]

did you try ebay? O saw a few there

 

[pop22]

Find your output voltage and get a variable current/constant voltage unit and adjust it to your liking. You can drive those LEDS higher than the maker did as long as you don't over do it. they'll stand up to 70-75% current rating with ease. Thje makers just don't want to warranty them at that level. I'll tell you something else too, I think that many of the companies claiming to drive their LEDs at 95-100% are lying and putting resistance, etc in the circuit..........I'll look on youtube because I saw a 50watt LED driven to the max and the brightness was blinding even from reflections! If I find it again, I'll post it for all to see.

 

[Wienerwoods]

So, I have now looked around quite a bit and the most legitimate looking contraptions I could find are these:

http://www.soaring-cn.com/productdetail.aspx?pdid=253 (the best I could find but ain't nobody got money for 10 pcs)

http://www.aliexpress.com/item/54-7...0-260V-300mA-Used-For-Various/2044593791.html

I'd be very glad if someone found even better ones but if these would work at >50W I can settle for the latter.

 

[GoeRilla]

http://www.aliexpress.com/item/54-7...0-260V-300mA-Used-For-Various/2044593791.html

Notice that it´s not for 110V and that the output voltage is lover that optimum for your 50 diodes.
Normally the foreard current over one led is more than 2V meaning that you need mere voltage if you use 50 diodes in one string.
It will probably work thoug but with less than optimal output.

Rilla.

 

[pop22]

http://www.ebay.com/itm/20W-150W-Wa...t=LH_DefaultDomain_0&var=&hash=item19f1c55151

 

[Wienerwoods]

http://www.ebay.com/itm/20W-150W-Wa...t=LH_DefaultDomain_0&var=&hash=item19f1c55151

Is this the 50W you were talking about? It seems a bit risky to me to have a current as high as 2.1A. It's a Chinese light after all, it might break right away...

 

[GoeRilla]

2,1 amps is way too much. 1 amp is max and will shorten life for the leds.
0,7 amp is optimal.

Rilla.