Edison Medium Screw Base LED Bulbs for Reading Lights. The Edison LED are specially designed to replace most Edison medium screw base incandescent bulbs used in many reading lights. These US made high-flux LED bulbs produce a warm white light and are fabricated from the highest quality components to assure long life and trouble-free functioning. Their incredibly low power draw (1W or 3W) makes them the perfect way to reduce energy consumption. High-flux LEDs, the latest LED technology, out-perform cluster LEDs in all respects. Fits household style sockets. 3W equivalent to a 60W incandescent beam. Ideal for solar panel users. Works on most low voltage outdoor lighting systems. Spot beam, best for directional light fixtures, bright enough to read a book. Long service life. Not hot, warm to the touch. Shockproof, ultra-rugged with no filament to burn out or break. UV, lead, and mercury-free. Not recommended for use in fixtures with colored lenses. Specifications: Input Voltage: 11-15 VDC (non-polarized), 12VAC Power Draw: 1W or 3W Color Temperature: ~3000 to 3800 K Shell Material: Die cast aluminum Mechanical Connection: E26/E27 Edison Medium Screw Base Heat Dissipation: Space is required to dissipate 1W or 3W of heat generated.