(2-pack) Grimaldi Lighting LED Bulb - 4 Watt Light For Recessed and Tracked Lighting Applications This bulb is not dimmable. This tiny little bulb throws out a surprising amount of light. The Limited Beam Angle That Is Usually Regarded As a Limitation for LED Bulbs, Becomes an Asset for Recessed Lighting Applications. An Incandescent Reflector Bulb Loses Lumens Because the Light Beam Is Reflected Down Inefficiently ... with This LED Bulb All the Light Is Directed Down, Which Makes It Perfect for Recessed Lighting Applications and More Efficient. Note that this bulb is relatively small, which does not completely fill many recessed lighting fixtures. We recommend smaller bulbs in these fixtures so that the bulbs have airflow around them. The thermal signature of LED bulbs is very different than incandescent bulbs. An incandescent bulb becomes hot to the touch throughout the entire bulb. Likewise, high temperatures have a much less significant impact on bulb lifetime. LED bulbs are very different. The illuminated surface is cool to the touch, all the heat is generated behind the LED components. Current LED bulbs that are put into fixtures without proper airflow can fail rapidly as thermal overload will quickly destroy the LEDs or the control chips. These control chips can only tolerate temperatures of about 120 degrees without degrading the bulbs lifetime.
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