Quote:
Originally Posted by 83bj60
When installing replacement bulbs we often hear about the necessity to install relays, thicker wire.... But the limiting factor reducing voltage is NOT the wire gauge, but the cleanliness of the connections, and, what is often forgotten, the cleanliness of the reflector housing itself! In other words, the condition of the connections in the circuit and a clean reflector and lens is more improtant than upgrading your wires and installing relays...
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All of it matters, including wiring. Small wires cause more voltage drop than big wires, and incandescent bulbs are very sensitive to voltage drop, a 10% drop in voltage leads to an approximately 33% drop in output. When you go to higher wattage draw bulbs, you may see an increase in brightness using the stock harness, but not near what they can put out as the voltage drop is increased by as you try to draw more current through the stock wires.
Daniel Stern Lighting Consultancy and Supply