Ltpgtphilips ehgolf42ses general benefits of eco halogens 42w warm white lamp with 2000 average life saves 30 in energy and electricity costs compared to standard incandescent bulbs like for like in size fully dimmable instant start up brilliant sparkling white light with a colour rendering index cri of 100 no mercury or other hazardous materialsltpgt ltpgtampnbspltpgt ltulgt ltligtsaves 30 in energy and electricity costs compared to standard incandescent bulbs