ROCCS Error Free 9-30V 2200 Lumens 3056 3156 3057 3157 T25 LED Bulbs for Reverse Backup lights Canbus Super Bright 6500K Plug & Play

This review is based on the 921 variant in the 2018 Honda Accord.The promised brightness of 2100 lumens per bulb (!!!) just seemed insane enough to try it. I think they do deliver, but right next to (very bright) 1000 lumen turn lights, they seem similar in brightness (despite the amber color of the turn lights). It specifically says 2100 lumen per bulb (while some listings combine the light output of the set of two), so maybe the it's the measurement method? Further, be aware of a few things ...While the 921 socket is the fit to the electrical contacts in the car, and in this case that is the right fit for the 2018 Honda Accord, it does not by itself guarantee that you can install these bulbs without problems since the shape is so different. Fundamentally, the rubber grommet instead of a socket allows these bulbs to fit a variety of cars, and the difference is in the cable extension that connects to car’s socket. The latter becomes a connector since in its stead the bulb’s grommet sits in the reflector. That’s maybe not the most elegant solution but it’s practical.In my case (2018 Accord), the backup lights are located in the trunk lid and peeling the liner to the side is as easy as removing one pop rivet and folding it over. You could technically get by without removing the rivet, but Honda has a little surprise for the unsuspecting intruder. There is a plastic wall right next to the socket, which may be unique to the particular car. (See pictures) It may make perfect sense to protect the socket and cable, but for these unusual bulbs they pose a hurdle.Part of the protective guard needs to be removed for the large heat sink of the bulb to fit and allow the rubber grommet to properly seat. It’s not too diffult as the guard is plastic, but promised bright light will not come to fruition if you’re not comfortable with making such modification.Once there is enough room for the heat sink, the bulbs fit in any orientation and that’s both questionable as well as advantageous. Questionable since there is no guarantee that the bulbs will be oriented properly, or that the chosen orientation is maintained. Advantageous may be that one can pick the most efficient orientation depending on the shape of your reflector. In the Accord is seemed to be beneficial to orient the bulbs as shown (picture).Once installed, the bulbs are truly bright, but not instantly. The curious start-up phase takes a second or two to reach peak brightness. In a way it’s similar to Xenon HID lights. Since it’s roughly 2 seconds, it’s not unbearable, but it does feel out of place for LEDs. It seemed intentional at first, but when you turn it off and back on with a few seconds between, it resumes with full brightness ... almost as if they had to warm up. Then again, it might help onlookers to “get used” to the brightness in normal use. The light itself is slightly blue but generally brilliant white. Typically that means improved night vision in addition to the “extreme” brightness.

Fits perfectly

Update 2/16/2021: After nearly two years, these things are still going strong.I've always been a fan of Autolumination's LEDs. They were always super bright, but a bit pricey and they usually lasted about a year. After my last reverse light failure, I finally decided to try my luck with Amazon and found these LEDs.Wow.I'm really not joking with that headline. These things are like driving in reverse with headlights. They are RIDICULOUSLY bright. They illuminate my entire garage when pulling in if the lights are out. I drive a 2008 Mitsubishi Lancer and even with the heatsink, I had no issues with fitment or installation. I personally don't understand the purpose of the large heatsink. Reverse lights aren't something you use consistently, maybe 15 second bursts. I deliberately left mine on for about a minute while testing them and the heatsink was barely warm to the touch. The reason I was concerned is because installing the reverse lights in my car requires that I remove the lining in my trunk lid and a hot heatsink will melt the liner. Fortunately, I won't have this issue.Part of me wants to buy a 7443 set for my brake lights, but that would be a bit much.

Very very bright.I ordered them for my reverse lights on a 2001 chevy silverado , they fit very snuggly with a universal style of ring with a gasket. Its hard to get them out of the housing, so they are very well seated and will not fall out.2weeks in my driver side reverse light went out , pulled the tail light when i got home and found the wires coming out of the 3157 style plug had melted and become un-soldered. Really noway to re-solder the wires due to plug design.Very thin gauge wire says "26awm 30volt 80°c wire" is all i can read on the white wires.Black wire says "200°c 3kv" but is the same gauge.Definitely china made wish they would have lasted, i cant stress how bright these are in factory chevy tail light housings. Would prolly be amazing in good aftermarket tail lights. 3 stars cause wires are so small, but would definitely recommend cause they maybe hit-and-miss.

The media could not be loaded.  Huge light output compared to 921 incandescents. Color is a little on the cooler side as stated in the product description.Installed on my 2017 Ford Focus RS and there is clearance for the heatsink. Fit is a little loose until you wiggle it in past the O-ring, then it no longer wiggles. Should not fall out but the connector to the original bulb socket is not weatherproof. A little bit of electrical tape solved that. Believe there should be no fitment issues with late model Focii that share the same rear light assembly.No errors and I didn't do a before/after video but the brightness of the LEDs is pretty evident in the video.

Put these in a 2012 Suburban whose stock BU lights might rival a candle on a good day. These bulbs are BRIGHT. What an improvement! Easy to install given that most cars these days require an hour of labor to replace. 2 screws and then pull the module out. Little blast of dielectric grease on the connector, insert the bulb and plug it into the module.Longevity? They have been installed for 2 days. Given that these gems are made in China only time will tell. They say they have a 1 year warranty but who knows? I’ve replaced other 194s with LED equivalents and I’ve had a 50% failure rate (NOT THIS MANUFACTURER). Chinese stuff can be hit or miss. Keep your receipt in your records. I have no idea how willing they will be to replace these bright boys if they fail prematurely.

Replaced the bulbs in the reverse lights of a 2008 Subaru Outback, they are nice and bright and installed easily. I need to experiment to see what is the best orientation (if any) for lighting up the back