bridglux, heatsink and power supply

[binkstir]

I was wondering if these parts would work together. If I'm way off base, tell me. I'm just trying to figure out how to safely run this led.

http://www.newark.com/bridgelux/bxra-c1200-00000/cool-white-led-array/dp/45P5610

I don't want to use the fan, just the heatsink.

http://www.geeks.com/details.asp?invtid=CK-77502&cat=FAN


What can I use as a power supply for 3 of these, converting 110vac to the proper voltage for this led?

This is to retrofit some compact fl light fixtures at work.

Thanks

lee

 

[jason 77]

If your not going to use the fan on that heat sink I think you will need a heat sink with more surface area. Also if these are to replace a CFL in a fixture I would make sure the fixture gets enough air flow so the heat from the LED has someplace to go.

You could look at a mean well AC/DC power supply for your power needs, but you still need some sort of Constant Current circuit to power the LED with.

If you are doing this strictly for energy savings, I don't think you will get much savings if at all compared to a good quality CFL?

 

[JohnR66]

CPU heatsinks are designed for forced air cooling. The fins are too close together for the best natural convective cooling.

I'd look for something with better convective and radiative heat dissipation.

 

[binkstir]

Thanks guys..

If you are doing this strictly for energy savings, I don't think you will get much savings if at all compared to a good quality CFL?

I'm not trying to save energy as much as saving parts. Our fixtures (over 150 of them) have 3 cfls and two ballasts. The 4 pin bulbs are continually burning out and we go through quite a few ballasts. The bulbs cost us $8 and the ballasts are $38 for a total of $100 in parts for each fixture. I was trying to find a way to make our existing light fixtures more maintenance free.
Btw the fixtures are about 26" in diameter, plenty of space inside them.

 

[evilc66]

How fast are you going through bulbs and ballasts? Sounds possibly like a thermal issue to me, and switching to LED won't necessarily fix that problem. $38 also sounds fairly expensive for a CFL ballast.