How many watts of LED can replace a 55W halogen bulb?
2 Answers
Generally, the efficiency of LED lights is 2-3 times that of halogen bulbs, so based on this ratio, an LED light with 19-28W can serve as a replacement. When replacing halogen bulbs with LED lights, it's important to note that the focal points of the reflector bowl and lens in the original halogen bulb setup differ from those of LED lights. LED lights may produce light beams that are not as uniform, and depending on the quality of the product, if the heat dissipation and constant current effects are poor, the lighting performance may also be relatively inferior. Additionally, improper handling of heat dissipation can significantly impact the vehicle itself. Below is some relevant information about halogen bulbs: 1. Principle: The main difference between halogen bulbs and other incandescent lamps lies in the fact that halogen bulbs contain halogen gases (usually iodine or bromine) inside their glass envelopes. The working principle is as follows: When the filament heats up, tungsten atoms evaporate and move toward the glass wall. As they near the glass wall, the tungsten vapor cools to about 800°C and combines with halogen atoms to form tungsten halides (tungsten iodide or tungsten bromide). 2. Pros and Cons: Halogen bulbs are an improvement over incandescent lamps, retaining their advantages: simplicity, low cost, ease of brightness adjustment and control, and excellent color rendering (Ra=100). At the same time, halogen bulbs overcome many drawbacks of incandescent lamps, such as short lifespan and low luminous efficiency.
I previously replaced my car lights myself and found that a 55-watt halogen bulb can be roughly replaced by a 15-watt LED since LEDs are much more efficient. I recommend choosing 10-15W LEDs, which provide similar lighting performance while saving energy. Remember, just looking at wattage numbers isn’t reliable—the key is lumens. A 55W halogen bulb usually delivers around 1,000 lumens, while a good LED only needs 700-800 lumens to match. I’ve personally tried using a 15W LED in my car, and the brightness was more than enough without generating heat. However, don’t cheap out by buying LEDs with too low wattage, like below 10W, as they may not be bright enough, especially for nighttime driving, reducing visibility. Also, make sure the LED is compatible with your car’s 12V system to avoid electrical issues. In short, choosing the right LED can also extend bulb lifespan, saving you money and hassle.
