... ,Taiwan chips 2,one watte can reach 80-90lm 3,for closet,indoor light 4,2years waranty The spec. of lampTYPE ... .2,Working environment: -20°C to 40°C.3,Suitability: for indoor application only. 4,Quality guarantee is based on storing ... is from -20C to 40C.If the products work beyond or below the conditon for a long time, the life expectancy will reduce ...