I recently bought some chinese 12 volt LED lights and mounted them under my dash. first time I left the switch on for more than 2-3 minutes they melted and started to smoke. what are you guys using for inside lights with a 16 volt battery?

If you can’t find 16V LEDs, one option is to use 12v LED strips and something like a LM2596 DC-DC converter. There are many options on eBay and Amazon for a few bucks: https://a.co/d/ecBgwKs

Connect it to your power source, put a multimeter on the output and turn the potentiometer knob until you get 12volts.

Look up "12v/24v LEDs" on Amazon. They work fine on 16v