Brennenstuhl energy saving bulbs 18w36w 4000k 2g102g11 brennenstuhl 1177660 this energy saving bulb 36w 2800lm 78lmw 2g10 from brennenstuhl is a quality class a energy efficiency u shaped bulb manufactured with a push in 2g10 fitting offering 2800lm luminous flux and 78lmw lamp efficacyluminaire maintenance factor 85 after 2 000h78 after 4 000h76 after 6 000h76 after 8 000h lamp survival factor 99 after 2 000h99 after 4 000h97 after 6 000h85 after 8 000h brennenstuhl 117766