3W LED dome light

A few years ago, I made a 66 LED dome light.
I used normal 5mm LEDs in red, and it wasn't very bright. (but very good for night vision)


Not happy with how bright it is, I decide to do it again.
This time, I decided to use 3W LEDs.
Each of them is rated at 350mA 3.5V, so I connected 4 in series.

That resulted in a 3.6V voltage drop per LED at 14.4V (engine running)
Using an amp meter, the actual current measured is only around 200mA @ 14.4V (under 3W), well under the rated limit (350mA for the LEDs, and 8W for the light's circuit on the car)


I originally wanted to jam everything into the stock dome light again, but space is a problem. And heat too.
So I decided to not use the stock dome light at all.

I used two aluminium bars as the base and heatsink.


Drilled and tapped mounting holes for the stars.

I used the M3 screws from optical drives.

And then I soldered the wires on.


I decided not to use a resistor this time, so they are directly connected to the dome light plug.


Using identical camera settings:
off:

on: