... product has high light efficiency, luminous flux reaches 1500 lm, lighting efficiency reaches 55lm/w. Compared with conventional incandescent lamp, its ... categories of wattage, optional wattage: 7w, 9w, 11w, 13w, 15w, 20w, 25w, 26w.3. This product has several categories of color ... of high quality, which is very beautiful. Optional bases: E14, E26, E27, B22.9. This product uses color box as its inner ...