I used (3) 3mm x 20mm Socket head cap screws.
You could use 3mm x at least 20mm Phillips Countersunk head screw as well, since I added a countersink feature.
LED Was a standard 12v 10mm wide string cut 50mm long with 3 LED’s in that segment. Make sure to use the spacers to keep the Light Bar Bracket away from the fan.
I wired the LED’s into the 40mm fan 12v power with a Dupont “Y” connector that I attached to the lights and the fan.
This is video of the LED mount in actual operations. It is very bright
This is the orientation.
This picture shows the location of the 3 spacers keeping the light bar away from the fan.
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