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Newly Enlightened
I can't make search work for some reason. So I will ask an updated question without knowing waht has been said. Sorry about that. I want to replace the H4 bulbs in a 2013 Honda CR-V. They have rotten headlights. What is the state of the art in H4 bulbs; ignoring an HID projector refit. If it should be Halogen, what is the best performing Halogen dual filament replacement. However, LEDs are an interesting possibility. I have researched quite a bit. LEDs (the chips, not the things they are stuck in) evolve at a fairly rapid pace. There are some very decent LEDs (brightness vs power + decent spectrum) on the market. Some should have been used in high performance H4 replacements. I have a flashlight that uses 4 Li batteries and 4 not really top end LEDs, which gets me around 5,000 lumens. And a range of colors are available in most LEDs. So, emission can be in the range needed for headlights. I completely (well, more or less - couldn't design one) understand the issues of reflector design and source positioning. And not annoying other drivers. Research finds either a bunch of experts that basically say "no LEDs can work properly, even though we have not changed our stance by following current technology in chips and mounting ideas", or pimping one LED "bulb" or another that they bought or got free for a "review". Generally with no meaningful measurements. Usually a garage door or back country road. I have had a set of retrofit HID projectors sitting in the basement for several years. I never managed to get a good place to work on such a project; so I am asking about current best choices without modifications to the car. It would be real helpful to get some expert analysis of the current state of the art. Preferably with some product recommendations.