# Wiring a traffic light as a brake lights

I am trying to wire in a set off traffic lights as my brake lights/turn signals on a rat rod truck. My question is how would I proceed with it? IE, they are a 120v ac design led bulb and would need them to run on a 12v DC setup.

• The easiest thing to do would be to replace the bulbs with LEDs that can run on 12v DC. – Grant Dec 28 '14 at 2:05
• They are a sealed unit of 40 in a lense unit and I would be afraid of cracking the lenses apart as there is a fitment issue in the housings. I don't know if they would go back in. – Todd Dec 28 '14 at 2:27
• Camper and Trailer parks often carry 12v. Edison base bulbs. – Optionparty Dec 28 '14 at 3:09
• This question appears to be off-topic and better belongs on the Automotive Stack Exchange – Passerby Dec 28 '14 at 9:02

Something like this would preserve the traffic lights as much as possible.

simulate this circuit – Schematic created using CircuitLab

The main thing is to put a bulb that's easy to deal with (i.e. one that uses 12V DC) inside the housing and illuminating the lens. After that, follow the same procedures that apply to all a car's lights. Low current switch -> relay -> lamp or high current switch -> lamp.