Cree CXA3050 Heat sink & Reflector

I want to run this at 1.8A and 37 forward voltage http://ca.mouser.com/Search/Product...tualkey57280000virtualkey941-CXA30500N00W227F. I'm planing on using this driver http://ca.mouser.com/Search/ProductDetail.aspx?R=CEN-100-42virtualkey63430000virtualkey709-CEN100-42. Anyway... I'm having trouble calculating a heat sink for it, but if I was to use a CPU heat sink rated at say 80W and up, would this be okay? I'd like to keep the COB as close to 30 Celsius as possible.

Not so important but would be better if I could find one but are there any reflectors for this COB that could make the beam angle around 50 degrees?

Thanks for any help

-Edit
I realize now that maybe trying to keep my COB at 30 Celsius might be hard unless I use a copper heat sink with active cooling I would assume (maybe even water cooled). So would 50-60 Celsius be a more realistic goal?

will the heatsink have a fan cooling it? im pretty sure when a cpu heatsink says 80w, thats with a fan.. not passive cooling.

I haven't picked a CPU heat sink yet, but it will have a fan on it.

I have ordered one of these for my project

http://www.ebay.com/itm/1-pc-up-to-...Electrical_Test_Equipment&hash=item19d4c21183

regarding the thermal issues.. are you familiar with the concept of thermal resistance?
http://en.wikipedia.org/wiki/Thermal_resistance

most heatsinks purchased from a reputable supplier will have a value for their thermal resistance. This lets you calculate how hot the LED will get. Some will have data for the thermal resistance for both moving air and still air.

Without a value for thermal resistance, there's no way to tell how effective a heatsink is, even if it says "80W". That might just refer to how much power it can handle before it melts.

Eggi said:

I have ordered one of these for my project

http://www.ebay.com/itm/1-pc-up-to-...Electrical_Test_Equipment&hash=item19d4c21183

Click to expand...

That's awesome. Wonder if anyone sells anything similar in USD...