GE 14928 50-Watt 570-Lumen Edison Halogen SpotLight PAR20 Light Bulb 50/100/150-Watt 3-Way bulbs Reveal bulbs provide clean, beautiful light with enhanced color spectrum light output: 450/1150/1600 lumens 50/150/RVL-2PK - To save energy costs, find the bulbs with the light output you need, then choose the one with lowest Watt 450/1150/1600-Lumen output and 50/100/150-Watts used, Lumens measure brightness of a light bulb, Watts measure electricity used to create light