Many people are looking for the brightest car headlight light bulb? Most people usually use power to define the brightness of car lights. High-power car lights are brighter than low-power car lights. In a sense, there is nothing wrong with that. But this is actually not scientific. Today we will discuss what factors affect the brightness of car lights.
There are two important light units for measuring the brightness of car lights: luminous flux and illuminance. Let’s discuss their meaning below.
What is luminous flux?
Luminous flux refers to the amount of light emitted by a light source per unit time, and is an indicator of the overall brightness of the light source. The unit is lm (lumens). For light sources, the value of luminous flux is fixed; the greater the luminous flux, the brighter the light source, and vice versa. The darker it is.
The most common method of measuring luminous flux: using an integrating sphere. The integrating sphere method is to place the sample light source in an integrating sphere (the integrating sphere is hollow and the inner wall is a highly diffusely scattering white barium sulfate layer), and then a sensor is used to receive the light. In this case, the sensor must be calibrated with respect to the reference light source.
What is illuminance?
Illumination (illumination, illuminance) is a physical quantity indicating the brightness of the illuminated surface. The illumination of a point on a surface is defined as the ratio of the luminous flux incident on the surface element at which the point is located to the area of the surface element. Numerically, it is equal to the luminous flux projected on unit area. In the International System of Units, the unit of illumination is lux and its symbol is lx.
The SI unit of illuminance is lux (lx). One lux is equal to one luminance per square meter.
1 lx = 1 lm/m 2 = 1 cd·sr/m 2.
Illuminance is the number of lumens per square meter. This means that when a 1000 lumen light source illuminates an area of 1 square meter, the illumination on this plane is 1000 lux. Therefore, if a 1000 lumen light source illuminates an area of 10 square meters, the illumination on this plane is 100 lux.
An illuminance meter (or lux meter) is an instrument specifically designed to measure luminosity and brightness. It measures the intensity of light (illuminance) in millions of electrons. It is the degree to which an object is illuminated, that is, the ratio of the luminous flux obtained on the surface of the object to the illuminated area. An illuminance meter usually consists of a selenium photovoltaic cell or a silicon photovoltaic cell and a microammeter.
Luminous flux is a measure of the power of visible light produced by a light source or light fitting. It is measured in lumens (lm). Note that luminous flux only relates to the perceived power of light.
There is a view that headlight bulbs with high luminous flux are the best bulbs.
From the above we know that luminous flux is the sum of brightness, but whether the luminous flux is converted into bright light shape and illumination is affected by many factors. Let’s look at the factors that affect the conversion of luminous flux into the brightness that the car really needs from the following aspects.
1. Light effect
What is light effect? Light efficiency is simply lumens per watt.
Light efficiency is one of the most important ratings for LED chips. You can think of it like the MPG factor in a car. The most efficient and affordable LED lights have a light efficacy of 200 lumens per watt.
Light energy and luminous efficiency of LED headlights: equal to the total luminous flux of the LED headlight bulb divided by the input power of the bulb.
High luminous efficiency means that the headlight bulb can achieve a higher luminous flux without requiring a high power output. Therefore, whether the light efficiency is high depends on the design of the circuit and the electrical parameters of the lamp chip. Therefore, choosing high-quality lamp beads is an important factor.
2. Whether the focus and structure of the LED headlight bead match the original headlight assembly.
Since LED car headlights are modified car lights, the actual illumination of the bulb depends on the structure and brightness of the bulb, and whether it matches the original car headlight assembly. Light illumination is affected by factors such as bulb power, heat dissipation, lamp bead size, bulb structure, etc. Simply put, if the structure of the LED headlight bulb is closer to that of the original car light, the lighting effect will be better, and it is possible to get a better beam pattern.
3. Beam angle adjustment
Some LED headlights offer adjustable beam angle. This will allow you to fine-tune light output for optimal visibility and focus. This feature is particularly useful, ensuring that light is directed where it is needed most without causing glare or discomfort to other drivers
Low-beam headlights: Also known as "low-beam headlights," low-beam headlights are designed for normal driving conditions and provide forward and downward illumination. They have a specific cutoff line that prevents light from shining directly into the eyes of oncoming drivers.
High Beam: High beam or "high beam" provides a bright and focused beam for long-distance visibility. They are ideal for country roads and situations with minimal oncoming traffic.
Fog Beam: Fog Beam is designed to emit a wide, low pattern to help minimize glare and reflections in foggy or rainy conditions.
4. Color Temperature will also affect the effect of car lights
Did you know that color temperature is about more than just appearance? It can actually affect the performance of your LED headlights too! Color temperature is measured in Kelvin (K) and represents the hue of the light emitted by a bulb.
Common color temperatures
3,000K: Yellow light, often used in fog lights
4,300K: Warm white light, similar to halogen bulbs
5,000K: Pure white light, providing a balance between brightness and visibility
6,000K: Cool white light with a slight bluish tint
8,000K and above: Blue light, generally considered visually appealing but may not provide optimal visibility
Recommended color temperature for LED headlights
For optimal visibility and safety, it is recommended to choose LED headlights with a color temperature between 5,000K and 6,000K. The scope provides pure white light for improved visibility without causing undue glare or eye fatigue to other drivers.
5. Different structures of headlights determine different brightness.
Car headlights can be divided into reflector LED headlights and projector lens headlights according to their structures.
Reflector headlights produce a larger beam pattern covering a larger surface area than projector headlights. If your bulbs are not aligned correctly, there is a risk of glare, which may not only result in an MOT failure but also cause blindness to other road users. The reflector lamp head design is relatively low in manufacturing cost, has less light output control, and the low beam cutoff of oncoming vehicles is less obvious.
Lens headlights are brighter than reflector headlights. They are less likely to blind other drivers. Because the lens headlights point downward toward the road, they do not shine into the eyes of other drivers.
6. Light decay speed.
A good headlamp will have a slower light decay rate. The speed of headlight decay depends on both the quality of the LED light chip and the heat dissipation design of the LED light. If the LED heat dissipation efficiency is high and the lighting temperature of the lamp bead is better controlled, the brightness will be longer and the light decay will be slower.
The above are some factors on how to choose the brightest car LED headlight bulbs. How to choose a high-brightness car headlight is also a relatively complicated issue. I hope I can help you buy the car lights you want.
