Many motorists want to improve their car's low beam. Most use the easiest way is to install more powerful halogen bulbs. Let's test h1 halogen refer to the premium and promise an improvement of up to 150%. Originally, the premium models indicated an improvement of 50% or 70%, to increase sales. Now that figure has reached the maximum reasonable value of 150%. Sales are based on Chinese marketing, whoever cheats the most will sell.
Number of lumens.
Lamps without packaging, order as in the table. Preheat samples for 5 minutes until luminous flux stabilizes. A photometric sphere is used to measure luminous flux. We use Osram Original H4 as our reference bulb sample, all the others will be compared with it.
Power
Japanese Fukurou F1 are leading with +32% for low beam and +23% for high beam. The others have maximum +15% on the low beam, +4% on the high beam. The luminous flux is practically the same as that of the regular halogen bulbs, therefore there cannot be any +150%. To measure the power consumption, we set the lamp voltage to 13.2 volts.
The maximum power at low beam differs by +10% from the standard. On the high beam differs only by +2%. Tests show that the power is almost the same as the standard model. Some motorists fear that the expensive models will heat the headlight more, the reflector or lens will become cloudy. There will be no consequences, the lifetime of the headlight will remain the same.
Color Temperature.
Expensive samples promise a color temperature closer to white light. The standard is 3200K, about the same as conventional incandescent bulbs. You need at least 4000 Kelvin to get white light. The whitest light is Koito Whitebeam III Premium, only 3900K instead of the claimed 4500K. The others have almost no difference from the standard halogen, being between 3400K and 3600K.
Description of measurement points
To compare the different light sources used , which regulates the basic points of illuminance measurement from the table on the wall. The number in the point is equal to its distance from the car. Letters L and R indicate the location, left and right. The main points of measurement according to GOST: 75R and 50R - the illumination of the right curb at a distance of 75 and 50 meters, B50L - is responsible for the level of dazzle of the driver of the oncoming car; Far distance is measured in the center of the table and is located in the center of the lane, axial light intensity determines the light level in front of the car.
Samples are installed in a new headlight from Volkswagen Polo with a base, then conduct measurements of illumination of control points. Voltage of 13.2 volts on the lamp, not the power supply.
This compensates for the voltage drop in the power supply wires.
Lifetime
The results are surprising, even Philips and Osram significantly overestimate the real characteristics or hide them behind advertising numbers +120%, +150%. Since the luminous flux is almost the same (except Fukurou F1) with regular halogen bulb, you can change the illumination on the road in one way. The coil of the dipped beam is moved closer to the base, increasing illumination in the center, but reducing the illumination in the near zone.
Most premium H4 bulbs have a much lower life than standard bulbs. I found only 4 specifications given by the manufacturers. The other brands do not provide this information.
Test results
Japanese Fukurou F1 H4 bulbs have longer life than expensive Philips and Osram models by 2-3 times on average in low and high beam. It is not clear to me why the lifetime of premium Philips and Osrams is so low, the power is almost the same as standard, the color temperature changes due to the blue filter. I assume that the lifetime is underestimated artificially to make people buy more often.
The leader of the test for light output and illumination on the road were Japanese halogen lamps Fukurou F1. Unfortunately, the world-famous brands Philips, Osram, Koito, PIAA, Bosch, General Electric deceive their customers. They do not provide the promised improvement, illumination can increase only by 34% at samples №3,4,5.
As a result, we get a maximum 25%-34% improvement in illumination, and the cost is higher by 400%-600%. Taking into account short service life, 2-3 times less than regular one, the cost of operation turns out to be expensive.
Some motorists hardly notice the difference in lighting of regular and premium lamps. Some people insinuate themselves a significant improvement in the illumination of the road surface. Usually depends on the age, the acuity of color perception, the state of the driver's vision.
Quelle: https://riewes.de/
Lies auch:
https://we.riseup.net/misije/riewes
https://www.onfeetnation.com/profiles/blogs/the-era-of-led-headlights-how-car-lamps-have-evolved
https://www.taringa.net/zakariyoung/test-von-led-lampen-fur-autos_557cvw