Hella H4 100/80W High Wattage Bulb, 12V

Great plug and play upgrade over stock output lamps. Unlike LED lamps these generate enough heat to keep the headlights clear of ice/snow in winter. Great for older drivers or country roads where better lighting is needed without having to add auxiliary lighting.

So far, these have been mighty fine bulbs on my '13 JKU Rubi although I would not use them with the stock 16ga wiring. With the PWM, your not getting even close to their full potential since voltage and current is limited. I upgraded to the Hella Vision plus housings, which made quite the difference themselves, using the included H4 bulb and stock wiring. You will need to get an H13 to H4 pigtail for this to work. Then I installed an upgraded wiring harness and installed the 100/80's in the Hella housings. On low, these things are now cutting through the dark like sunrise and with the Hella housings, the light is focused with a nice cut-off so I'm not blinding traffic. On high beam, they throw farther than I can see. Even with the light flickering problem from the PWM since I don't have a capacitor installed yet, the difference is dramatic. Yes, you will need an anti-flicker on the harness upgrade since the PWM really messes with the load relays needed to run full current to the higher output bulbs. They flicker just like LED's since the relay's are turning on and off so fast it sounds like a bee buzzing. Hopefully my 2nd order for the anti-flicker device will be here tomorrow since my first order was through an 'overseas' supplier and is still over a month out.The one major problem I'm having is that when driving the back-roads, bugs come from miles and it sounds like I'm going through a rain storm. I've had to start carrying around a gallon of washer fluid as I go through so much now.Edit 1.0 - I received the Rigid anti-flicker device and I guess the more stable current really brought these 100/80's to life. The relay buzzing was cured instantly. I pulled them and reinstalled the factory wattage Hella bulbs. With the updated harness and the Rigid anti-flicker installed these were just too bright to run on the highway. My goodness they got hot! To the point even with the upgraded wiring I was concerned of melting something. I could not touch the Hella glass reflectors without causing pain. It's fortunate I did swap back because these bulbs running 'wide open' charred the ground plug slot on my ceramic H4 connector after a 30 minute road test. The stock bulbs with the upgrades are giving me more than enough light to see by and although under the right connection conditions these 100/80 will throw incredible light, they had to go. Also, now I don't have to worry so much about Mr. D.O.T. officer saying hello to me. If I ever run the Baha in my Jeep, I will put them back in with even heavier upgraded wiring but for now they will just collect dust on the shelf.

I bought these several months ago. I was using Silverstar and Phillips Xtreme bulbs that adjust the capsule size and gas mix for more light output per watt, at the cost of high temperatures and short bulb life. I thought going with these Hella bulbs rated for a high wattage might give me equivalent or better light output but longer life.Well, much to my disappointment, while these bulbs were bright -- even brighter than the Xtreme's -- they did not necessarily last any longer. After only 2 months in use one of the bulbs burned out. Fortunately I bought two pairs so I'll replace the one hoping it was just a random manufacturing defect, but I am not encouraged.Edit 3/1/13: So its been around 6 months now since the first bulb burned-out and was replaced. No further problems, so I'm going to assume the one bulb that died quickly had a manufacturing defect. I'm getting a fantastic amount of light in Bosch 7" round e-Code H4 reflectors on my Jeep JK -- probably around 5X the illumination of the stock setup. But even with all that light AND the Jeep lifted 4", I never get flashed about glare by oncoming traffic. I'm ordering two more bulbs to have spares on-hand. Rating upgraded from 2 to 4 stars.Edit 10/17/15: Perhaps I got one bad bulb or it got contamination of the glass between manufacturing and my door. The other bulbs I purchases are still working after more than 2 years. So I'm upgrading the rating again to 5 stars but leaving the title in case someone else experiences the same problem.BTW, make sure you have adequately rated wiring, connectors and fuse holders. I was using a no-name 8-position fuse holder rated for 100 amps. Well it melted and I lost my low beams one dark and stormy night and had to drive home on high-beams (much to the oncoming traffic's displeasure). I replaced the no-name fuse holder with the higher-quality Blue Sea Systems 5025 ST Blade Fuse Block - 6 Circuits with Negative Bus and Cover, rated 30A/connection, and even that one is starting to melt a bit.