... MR11 BULB, MR11 HALOGEN REPALCEMENT, 50,000 hours lifetime 2 years warranty CE/ROHS SPECIALITIES:1) use 6063# streched aluminium with thermal ... coefficient of 201w/m.k2)wind wide thermal sink and aluminium plate3)good heat sink ... ,60 degree Work temperature: Below 35D Base: G4 Include: aluminium heat sink , pmma lens,constant current driven,led, Dimension: ...