Light Efficient Design LED-8039E42 Led-8039E40-A Bollard/Post Top Retrofit LED Light Bulb, 4000 Kelvins Na Made in USA Ballast bypass compact design delivers broad, even light distribution when retrofitted into HID Bollard Fixtures Easy to install, reliable retrofits provide an energy savings up to 80%. rotatable base Insures that light output is directed to where it is needed Safety rated and heat tested within fully enclosed Fixtures from -40 to + ambient temperatures Wow LED replaces metal halide (MH) or high pressure sodium (mps) high-intensity discharge (HID) lamps up to Passive cooling and active temperature control. Integrated ki surge