Featuring T3¼ flange base that fits most 2- and 3-cell flashlights, 3 W LED PR-Style Bulb is available in sunlight-visible Cool White. Model F321-3W-0CW-001 supports voltages from 0.85-4.5 Vdc, while Model F321-3W-0CW-002 supports voltages from 3.6-9 Vdc. Solid-state, weather-resistant lamp is impervious to electrical and mechanical shock, vibration, frequent switching, and environmental extremes. Low power draw enables batteries to last up to 92 continuous hours.