Easy Installation: Simply screw the yellow light bulb into an outdoor light fixture with a standard E26 medium base, ensuring that the sensor is exposed to ambient light, and then turn on the fixture. Dusk TO Dawn – This dusk to dawn led outdoor light bulbs detects light ambient temperature and turns on automatically when the sun goes down. Simply keep your light switch on and let the sensor do the rest. Note: This bulb is non-dimmable. Replacement Light bulbs: Slim and cylindrical shape,Perfect replacement for incandescent light bulb led. Much slenderer than A19 light bulbs. Only 1.42 inches in diameter.It replaces a 40-watt light bulb by consuming only 8.5 watts." Enclosed Fixture Led Bulbs : Bug light bulbs 40w Amber Light( 2000K ) can for use in totally enclosed recessed outdoor fixture,Damp location approved,but do not use where directly exposed to water. Wide Application –This amber light bulbs suitable for outdoor applications such as covered driveways, patios, porches, decks or in string light decorations. Jolux 2 Pack LED Stick Light Outdoor ,Dusk to Dawn Bug Light for Porch 8.5W Auto On/Off, 40W Equivalent,Amber Light(2000K),650lm,E26 Base,Damp Rated,Patio,Deck,Backyard.