Will a 12v55w bulb light up if replaced with a 12v100w bulb?
2 Answers
It will light up, but it is not recommended. Below is the relevant introduction to automotive bulbs: Scope of application: Suitable for various high-altitude and open-field operations requiring all-round, multi-angle, long-distance, and wide-range inspection, search, tracking, rescue, and construction work; such as railway, electric power, public security, steel, petrochemical, and other unit engineering lighting vehicles, patrol vehicles, emergency repair vehicles, etc. Features: The lighting source uses imported titanium-gold tungsten halogen bulbs or high-end car xenon headlights, which can fully utilize the large-capacity 12V batteries of automobiles (12V), ships (24V), and other electromechanical equipment for long-term operation; it can also be paired with large-capacity high-energy batteries for lighting.
As a frequent car modification enthusiast, I once tried replacing the original 12V55W headlights with 12V100W bulbs. They did light up since the voltage matched and the filaments conducted electricity. But I soon discovered the problem: doubling the power increased the current, and the original thin wiring became hot to the touch within minutes of turning on the lights. The fuse often blew, and once it nearly caused a short circuit. Research revealed that standard car lighting circuits are designed for low power only. Forcing higher-wattage bulbs can melt wires, damage switches, and even pose a fire risk. My advice: don’t recklessly swap bulbs. To improve brightness, consider upgrading to LED lights or OEM kits. Don’t risk damaging the entire system for temporary brightness—safety comes first.
