Brennenstuhl energy saving bulbs 18w36w 4000k 2g102g11 brennenstuhl 1177470 this energy saving bulb 18w 1200lm 67lmw 2g11 from brennenstuhl is a quality class a energy efficiency u shaped bulb manufactured with a push in 2g11 fitting offering 1200lm luminous flux and 67lmw lamp efficacyluminaire maintenance factor 97 after 2 000h95 after 4 000h94 after 6 000h92 after 8 000h lamp survival factor 99 after 2 000h98 after 4 000h96 after 6 000h93 after 8 000h brennenstuhl 117747