According to the search results, the brightest LED bulb depends on the intended use and the lumen output. Here are some of the brightest LED bulbs available:
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300 watt Aries 3 E39 LED Light Bulb: This bulb produces almost 40,000 lumens with a high efficiency of 138 lumen/watt. It is ideal for replacement of 1000 watt HID/HPS/Metal halide or CFL fixtures.
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1200 Watt LED StadiumPro III Ball Field Light: This LED light generates 162,000 lumens with high efficiency of 135 lumens to watt ratio. It is used for sports lighting and produces 5000K bright white.
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500 Watt NextGen III: This LED light generates about 470,000 lumens with high efficiency of 135+ lumen to watt ratio. It is a 5000K bright white light and replaces the 1000W metal halide lights used in the parking lots, roadways, walkways and sport courts among other places.
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SANSI 27W A21 Dimmable LED Light Bulb: This bulb produces 3500 lumens and is warm white. It is available for about $58 and is ideal for indoor use.
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Great Eagle Lighting Corporation Super Bright 150W-200W LED Light Bulb: This bulb produces 2600 lumens and is non-dimmable. It is available in cool white and is UL listed.
It is important to note that the brightness of an LED bulb is measured in lumens, not watts. Therefore, when shopping for an LED bulb, look for the number of lumens directly across from Brightness on the Lighting Facts label.