Check the listing for details. LED Drop-in Tower (1 Mode) for Surefire M3 M500 M900 M961 M962, Nichia 519A Cool. Condition: New. Listed at 58.00 USD. New Updated and Upgraded 800 Lumens Version. (March, 2023)New Nichia 519A LED VersionGeneration 5:Switched to Nichia 519A LED from Nichia 318A resulting in higher output and improved tint. (March, 2023) Important Note: This LED module will NOT fit the 1st Generation Version M500 Weaponlight, if you are not sure please ask before your purchase.This is the Cool White Version. For Neutral White 4000K 80-CRI Version, please go here:https://www.ebay.com/itm/323549213784For Warm White 90-CRI Version, please go here:https://www.ebay.com/itm/222101606304 M3-LED High Output Single Mode LED Tower Module (3.6V-13V Regulated Input)-High Output Nichia 519A LED (Max Output 800 Lumens)-3.6V to 13V Regulated Input for Maximum Flexibility-Cool White, Cool Colour Temperature (5700K)-Direct Thermal Copper MCPCB-Reverse Polarity Input Protection-Over-Discharge Protection-Precision Machined Aluminum Lamp Assembly-Every Lamp Assembly is Pre-Focused for the Ultimate SpotCompatible with:SurefireM3M500 Series Weaponlights (Will NOT fit the 1st Generation M500, if you are not sure please ask before your purchase)M900 Series WeaponlightsM961 WeaponlightM962 WeaponlightImportant Note: This LED module will NOT fit the 1st Generation M500 Weaponlight, if you are not sure please ask before your purchase.Runtime:1 x 17670 (1600mAh): ~1 hour1 x 18650 (2900mAh): ~2 hours2 x CR123a Primaries: ~2 hours2 x 16340 (750mAh): ~2 hours3 x CR123a Primaries: ~3 hours3 x 16340 (750mAh): ~3 Hours2 x 17500 (1100mAh): ~2.5 hours2 x 18500 (1500mAh): ~3 hours2 x 18650 (2900mAh): ~5.5 hours3 x 18500 (1500mAh): ~6 hours