... life span 3.environment protection 1*1W led wall light ( high power ): Products applicable occasions:Applicable to hall ,office of local ... constant-current drive power, stable performance.3) This series products recommended changling Monochrome, service life 50,000hoursSpecifications:n Working voltage: ... INTERESTED IN OURPRODUCTS, PLEASE CONTACT US ASAP. EXPECTING COORPERATION WITH YOU, THANK YOU!!!