Check the listing for details. LED Upgrade Drop-in Module for Streamlight Super Tac, Super Tac X (850 Lumens). Condition: New. Listed at 38.50 USD. Nichia 519A Version, March 2023. With this LED Assembly, you can upgrade your Streamlight Super Tac flashlight to modern standards. This LED assembly will more than triple the output of your light compared to the original Streamlight LED assembly!! Featuring much higher output with the efficient circuit board driver and a higher colour temperature (whiter and brighter), this is a must have upgrade if you own the Streamlight Super Tac!! It also allows the use of 3.7V rechargeable batteries to save battery costs, of course normal CR123a primary batteries can also be used as normal. No modifications necessary, you just have to replace the original LED assembly with this new LED assembly. SC4-LED High Output Single Mode LED Module (3.7V-9V Regulated Input)-High Output Nichia 519A LED (Max Output 850 Lumens)-3.7V to 9V Regulated Input for Maximum Flexibility-Maximum Current Output at 1600mA-Direct Thermal Copper MCPCB-Reverse Polarity Input Protection-Over-Discharge Protection-Precision Machined Nickel Plated Brass Lamp Assembly for Superior Conductivity-Every Lamp Assembly is Pre-Focused for the Ultimate Spot Compatible with:StreamlightSuper TacSuper Tac X(Light will turn into Single mode when used on Super Tac X)Super Tac IR(Light will turn into white light LED when used on Super Tac IR)***If you have questions regarding compatibility, please contact us with a photo of your light BEFORE purchasing.*** Runtime:2 x CR123a Primaries: ~2 hours2 x 16340 3.7V Rechargeable: ~1.5 hours ***This listing is for the LED upgrade module ONLY, all flashlights in the photos are for reference use ONLY and NOT included in this listing.***