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Note: white lights have a forward voltage of 2.9V unlike red and amber lights, which have a forward voltage of 2.2V. Minor design changes will need to be made for white lights.
Drivers:
Constant current boost converter
https://www.digikey.ca/product-detail/en/texas-instruments/TPS61165DBVR/296-27597-1-ND/2340765
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