Length 134mm width 134mm ge watt miser 21 watt 2d 4 pin gr10q compact fluorescent lamp this energy efficient 2d pl q lamp has an average life of 12 000 hours and has an a class energy efficiency rating 2d lamps are available in colours extra warm white 827 standard white 835 actual wattage is 19w this lamp will save you pound170 per lamp life ge 2d lamps are the only 2d lamps on the market that are recommended for emergency lighting applications ge 2d watt miser lamps deliv