Hey Everyone, I have been a "viewer" of this site for a long time and I guess I finally need the community's help. I am currently working on a setup using high powered LEDs (about 180W) and need a way to cool them. The idealistic solution would be completely silent (no fans) and I thought of two possibilities: passive water cooling, or just plain passive heat sinks. The LED chipset is 12mm by 12mm which means that any CPU heat sink will fit (mounting is not a problem). My big question is if there is some sort of SILENT water pump (I heard about a magnetic bearing pump I think?) that would be able to sufficiently cool this chip. If not, what type of CPU heat sink would you recommend that works best without a fan. Thanks a lot!