Do you offer a passive cooling version (no fan)?

LOL @ those other answers. Modern LED grow lights are often cooled passively. No 25mph winds or heatsink the size of Delaware. *eyeroll* (I have 600w of LED for my tomatoes and peppers, manufactured by a famous company, all passively cooled. However, those go through extensive research and development. This could probably cool 5-25 watts of LED without a fan, but heatsinks like these are specifically designed for air to flow over them. The tight, tall fins just pass heat back and forth without air movement. A much different design of heatsink would be needed for 50-100w. You can get a very silent 80mm fan for not much money, $9-$16. Brands like SilenX, Arctic F8, BeQuiet!, or GeLid are options. Then you just need a 12v 1A power sully to the fan.

Can this also fit a 150 watt led chip?

This heatsink fit 20W/50W/100W/120W ,If use for 150W we suggest choose this 2 models will better: http://www.amazon.com/dp/B01CTZ8X8Y or http://www.amazon.com/dp/B01D1J1JFQ

I prefer something with passive cooling (videography) because fan noise is not acceptable. How many watts will it sink if fan is removed?

As already mentioned, air movement accross the fins is what removes the vast majority of the heat. And, there are some extremely quiet fans available. They spin slower, so less noise.

Do you have an option to purchase without fan i already have 120v 80mm fans just need heatsink, lens assembly and screws.

I am sorry, Our inventory in amazon wareshouse all include the fan.

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💡 Illuminate Your Projects with Precision!

QUIET OPERATION - Enjoy a noise level of just 30 dB.
BRIGHTER FOCUSED LIGHT - Enhances brightness for high-power LEDs (20W-100W).
VERSATILE APPLICATIONS - Ideal for automotive, plant growth, and more!
UNLEASH YOUR CREATIVITY - Perfect for DIY projector lights and floodlights!
SUPERIOR COOLING PERFORMANCE - Copper core radiator ensures optimal heat dissipation.

The TXAluminium Heatsink Cooling Fan is designed for DIY enthusiasts looking to create powerful lighting solutions. With a robust copper core radiator for superior cooling, this heatsink supports high-power LEDs ranging from 20W to 100W. The included 44mm lens offers a 60-degree beam angle, making it perfect for various applications, including projectors, floodlights, and automotive lights. Compact and efficient, this product is a must-have for any innovative lighting project.

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Product Dimensions	3.11"L x 1.14"W x 3.11"H
Brand	TX
Voltage	12 Volts
Wattage	100 watts
Cooling Method	Air
Noise Level	30 dB
Material	Plastic
Manufacturer	TX
Part Number	310
Item Weight	15.8 ounces
Country of Origin	China
Item model number	H&PC-73411
Is Discontinued By Manufacturer	No
Size	1 Count (Pack of 1)
Style	heatsink+60 degree lens
Item Package Quantity	1
Special Features	100W led heatsink, heatsink
Batteries Included?	No
Batteries Required?	No

TX Aluminium Heatsink Cooling Fan+44mm Lens 60 Degree for 50W-100W LED Chip (3.11" L x 3.11" W x 29mm H, DIY Projector, Floodlight, Automobile Light, Plant Growth Light)

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