ENERGY-SAVING BULBS: Tube Diameter (mm): 7, 9, 12Plastic Diameter (mm): 41, 48Length (mm): 95, 100, 115, 130Watt: 28, 32, 36Color Temp.: 2700K, 4000K, 6400K, 7000KOperating voltage: 110-130V/50-60HZ or 220-240V/50-60HZLumens: 275, 385, 605, 825, 990Base: B22 / E27Life-time (hrs): up to 8000CE / RoHS approval. 4U yellow color skirt energy-saving bulbs