BEAMTECH H-4 Bulbs, S1 Series 900-3 Fanlsess 300% Brighter 6500K White Fog Light, 2 Bulbs

As everyone says the lamps arrived quickly and were packaged well. I was doing a complete headlight assembly replacement so it was very easy to install the new lamps on the new headlights.With the passenger side connected the lamp worked correctly, the high beam indicator lit on the dash, and the fog lights functioned properly. However, after I installed the driver's side lamp the lights misbehaved. It was daytime so I could not tell if the beams were lit properly. As night fell I determined that I had to have the fog lights switched on in order to get the lamps to shine on low beam. The high beam indicator did not light and I could not turn them on using the turn indicator.I had read a number of comments about these lamps and the great customer service from the seller so I was expecting an issue to arise. I communicated with the seller through Amazon and yesterday I installed the resistor wiring harnesses they sent me very quickly. It took me a couple of hours to attached them to the rear of my radiator core support, and except for seeing some rivets on the core support, you would never know they are there. Yes, they do get hot quickly so that is why they tell you to attach them to metal and not plastic parts.After re-installing my headlight assemblies it was test time and everything functions properly. The low beams come on, the high beam switch works and the high beams light, the indicator on the dash lights, and the for lights work with the low beams like they are supposed to.I am extremely pleased with my decision to purchase BEAMTECH LED lamps for my truck and I am also extremely pleased with the customer support provided by this seller. If you are thinking of buying LED's for your vehicle definitely buy from this seller. I was so impressed with the lamps that I have even upgraded my 99 Chevy C2500 to BEAMTECH 9005 & 9006 lamps. I will recommend them to anyone I know who asks!!

I used these bulbs to replace the headlights on my Yamaha FZ1. The OEM lights just weren't amazing. The difference between the factory units and the BeamTech bulbs is amazing. I can actually see well down the road, and better to the sides as well. The bulbs seem to work well with the reflector design, and the pattern on low beam seems to work very well without blinding oncoming traffic.The water seals on the factory bulbs won't stretch over the larger heat sinks without a huge fight, but if you put them on the bulbs from the front before putting the bulb in, installation is a breeze. 10 minutes tops.I am looking into buying another set for my cars soon. Great lights and a low price!

I have these bulbs installed in my car and two motorcycles.Thus far I have found them to be vastly superior to other LED retrofit bulbs I have tried, even those that cost more. The key is that these bulbs arrange the LED emitters in a manner that mimics the shape and light output of a filament bulb closely enough that they will still work with your stock reflectors. Or, at least, they work with the stock reflectors in a Subaru Crosstrek (1st gen), Kawasaki KLR650 (2nd gen), and Yamaha FZ6R. This is a big deal, because the main problem with LED retrofit bulbs is that most of them don't seem to work properly with reflector type headlight assemblies and waste most of their light output by blinding oncoming traffic an illuminating the sky rather than the road. These project perfectly in all three vehicles I have them in, with a clear and correct cutoff for oncoming traffic that is indistinguishable from stock.I also like that these have a lower profile design than most and do not include nor seem to require a fan. Maybe they're not "as bright" as fan equipped models, but they're clearly brighter than stock H4 bulbs which is plenty enough for me, and the lack of fan sticking out the back means that they're easier to fit in more vehicles and have one less failure point. I assure you the fan is the cheapest component in your bulb assembly, and when it inevitably goes, soon after go the emitters. These are also silent while in operation, which doesn't sound like a big deal but when you're creeping up a mountain road in the dark at 3 AM, it kind of is.I have had no longevity issues, fan or no fan. I've been cooking the ones in my Subaru for going on three years now and they do not exhibit any noticeable dimming and have required zero maintenance or adjustment since I put them in.There is still a sizable heat sink that sticks out the back, so there must be about 2" of clear space behind your bulb socket at minimum to fit these, a little more if you don't want to annoy yourself getting them in. Most H4/9003 equipped vehicles have that rubber boot thing surrounding the plug... My Subaru does, and I was able to stretch it over the heat sink and put it back in place, just in case it ever matters. The bulbs themselves seem to be waterproof (or waterproof enough, I haven't drowned one on my bike yet and they're completely exposed with no rubber boot there) so even if you can't do this it's probably a non-issue, unless the design of your headlight assembly allows water to get in behind the lens.

They seemed bright for a bit, than error codes on car less than a month in use and dimmed (V4 error right out of box)Company seems easy to deal with and sending replacements ?(see update)I hope i just got a bad set, because the changing of bulbs is a real pain and cannot drive with constant error messagesSo I will update when replacements arrive and again hope they last more than a few weeks****update July 2025, I get email from them after they tell me to cut wire an destroy lights and send pictures, I do as they ask then they email week after and say there not sending. So I destroyed dim bulbs that error when I could have returned or got decoder to see if error goes away**I will see what they do but they seem to be back tracking out of replacing what they told me to destroy!!!