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How to Install Interior Car Lights via the car battery-Step 5. To complete the electrical circuit - you'll now just need to attach the earth wire from your led/neon tubes to the negative ground earth of the chassis. You can do this in TWO WAYS...
To get the best performance out of your LED light or array, you're going to want an LED driver. If you're not familiar with the term, an LED driver is a power supply that is self-contained and which has outputs that are matched to your LED or LED array's electrical characteristics. The Need for LED Drivers.efore designing or selecting a driver circuit, you should also know the two ways of controlling forward current. The first is using the LED VI curve in order to determine how much voltage should be applied to the LED to get the forward current that you want.