... 50mm.11. Isolated driver ensures high safety. 12. Long life-span: 50,000hrs, 6 times longer than traditional light. SpecificationsName3W High ... use (applicable for dry environment) Weight36g (net), 50g (gross)Life span 50,000hrsCertificationCE, RoHS,FCC Warranty2 years Dimension Cases:Factory:2011 ...