American Lighting PG40F-E17-WW Dimmable LED G40 Globe Light Bulbs, Ideal for String Lights, Intermediate Base, Frosted Glass, Warm White, 25-Pack Dimmable, LED replacement bulbs for indoor/outdoor light strings Professional grade LED lamps last 25,000 hours (6,250 days at 4-hours per day equals 17.1 years) Intermediate base, frosted light bulbs, warm white 2700K color temp G40 bulb shape, 120-volts, 1-watts, 40-lumens 25-pack, intermediate base lamps, use with string light model: LS-I-15-BK