![]() ![]() I actually thought it would be closer, the Chinese Opt7 LEDs failed to measure even remotely close in output to the German halogens, despite their significantly higher manufacture lumen rating. The 5800 lumen Osram halogen was a solid 609 Lux. The 7000 lumen Opt7 LED, beam pattern was very spotty for headlight reading, likely due to hot spots and scatter in the beam. This is why a projector retrofit is needed to control glare with LEDs. There is zero resemblance of beam control. This is why you should not run an LED in a halogen reflector. Opt7 LED on right (passenger) resulting in complete mess of a beam, lack of beam saturation with the loss of the cut off horizon, so much so it is even bleeding over the driver-side cut off horizon of the halogen. Though using a massive light output upgrade, the beam control is equivalent to stock. This is a major loss in control and performance. The passenger LED light is not actually brighter, it has lost the horizon beam control due to improper optics, and is now emitting light above the horizon. LEDs in a halogen reflector cause massive glare/scatter. LED on left (passenger), Ultimate 100%+ brighter than stock halogen on the right (driver). I include these to demonstrate that it is not the light source being brighter that causes the issue. Yet to the oncoming driver these look nearly identical because the cut off horizon is maintained. Stock halogen on left (passenger), Ultimate 100%+ brighter than stock halogen on the right (driver). Note also that LED light is directional, vs the halogen is omnidirectional, further compromising reflector optics. It is easy to see the halogen filaments are on a hairline in the center of the bulb, and the LED diodes are significantly offset from center. The upper rear portion of the reflector responsible for distance projection is very poorly illuminated by the LED design, which also results in loss of distance illumination. But more importantly, LEDs produce directional light fired at the sides of the reflector and will not illuminate the reflector surface uniformly like a halogen bulb resulting in performance loss. The small changes to size and position will have significant consequences on beam pattern, this is why HIDs do not work in a halogen reflector. The reflector is based on precise filament size and position, and having an omni-directional light source. While the diodes are in the approximate place they are not identical to the halogen bulb filament. But that is if they are a respectable high quality manufacture with reputable specs, many cheap Chinese LED manufactures are anything but. Meaning that 3500 lumen spec is actually closer to 1750 lumens. Actual lumen output is typically near 1/2 the raw rating. To further muddy the comparison, LEDs are listed in 'raw' lumens, or theoretical lumens per chip multiple by the number of chips. Meaning these Opt7 7000 lumen LEDs are actually 3500 lumens each, compared to the Osram halogens rated individually at 2900 lumens each. Interestingly LEDs usually rate lumens in pairs, while halogens rate them individually per bulb. These are a significant light output upgrade without compromising optics by utilizing technology that is designed for the stock reflector halogen lens. These bulbs are over 100% brighter than stock while still maintaining reasonable bulb life. The halogens in this experiment are the 5800 lumen Osrams from the Ultimate headlight upgrade. They also utilized smaller LED diodes than many others manufactures, meaning they had a better chance of mimicking a halogen bulb filament than the other manufactures using larger diodes. LEDs require projectors to control glare but will still be outperformed by halogens, here is why.Ĭhinese Opt7 7000 lumen LEDs vs German Osram 5800 lumen high powered halogensįor this experiment I chose the 7000 lumen OPT7 LEDs as they are very popular on the forum, advertise above average output for LEDs, and claim to have solved the LED product flaws to "outshine the rest". ![]() Rather than trying to reiterate the same points repetitively to no end, I thought it would be beneficial to create a constructive educational informational thread for reference.Ī disturbing trend has become to stuff LEDs into halogen reflectors thinking it is a plug and play replacement when it is about the offensive equivalent of putting an HID bulb in there for oncoming drivers. This forum is awash with mis-information on lighting. ![]()
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