T10-4.0W-WW

I rarely write a review the same day I receive an item but I feel inclined to do so for these bulbs. They are amazing!I can't speak to the longevity obviously since I've only had these bulbs a day but as far as equivalency to the stock incandescent bulbs, these bulbs are an amazing match and only use a fraction of the power (4w vs 18w) which is really going to come in handy during our fall camping trip to Denali where there are strictly enforced generator run times which means we'll need our battery bank to hold up for the night.I purchased the "warm white" version because we don't like the "blueness" of high kelvin LED bulbs we've tried in the past. Like so many others out there, I made the mistake of wasting money on the low cost LED wedge bulb replacements widely available on the web only to be totally disappointed by the blue tint and halo effect of the light they put out, not to mention the color temperature being way off what the bulbs were advertised to be. Basically I ended up with a 10 pack of useless LED bulbs that ended up in the garbage and the old incandescent bulbs going back in. Lesson learned...When I installed these today I started off by installing a new bulb in one socket of a dual bulb fixture while leaving the incandescent bulb in the other socket. I did this so I could compare the light output and tone of the LED against the incandescent side-by-side. The results were truly amazing. I could hardly tell the difference between the two bulbs. Both were equally as bright and the "warm white" color tone was nearly equal between the two. I have to admit the LED was just a touch brighter and maybe a few kelvin higher on the color temperature scale but nothing like I've seen with cheap LED replacements in the past. Truly about as equal as I've seen with any LED replacement I've ever attempted.So I recommend you do yourself a favor, if you're serious about replacing your old incandescent bulbs with LEDs, skip the cheapos and go straight for these premium bulbs. In the end you'll save yourself a lot of disappoint.

Shipping was instant. Ordered the 19th and received them 830am on the 21st. I ordered mostly bright white but also ordered warm white for above the couch and above the recliner. The photo shows the led above the recliner in warm white and bright white installed above kitchen sink so you can clearly see the difference in color of the led bulbs. I didn’t care for warm white so happy I ordered extra bright because I ended up replacing the warm white for bright white throughout entire motor home. The install was easy and quick. If I had known how easy it was I would have upgraded to LED sooner. The lights in the walkway with tallest ceiling height really brighten up the main areas. I am totally pleased with the product and the seller. I choose this seller because the reviews recommended this specific brand of LED bulbs so I knew I wanted their brand and the seller turned out to be awesome in both shipping and communication. Updates during the whole day, lol it took to revive them. I actually got a few emails with my order progress all way until delivery. I bought LED bulbs at an RV show a few months ago without bothering to check what bulbs I needed and still have them and having these to compare to. I can say these are much better quality bulbs and so much less expensive. I fitted my entire 30 foot class c for under 100 dollars where as when I got the wrong bulbs I paid the same amount for eight bulbs. I am happy with the clean crisp light they produce and I left the bathroom light one purposely to see if they got hot and they were cold to touch after a half hour so that is reason enough to make the switch. Also the phots shows the warm white cast a yellowish tone over my blinds and wall paper. The bright white depict accurate color of balance and blind

I was concerned about installing LED lights in our trailer. It seemed that you only had the bluish, white LEDs that glare and are hard to look anywhere near them, or ones that were yellow and didn't have good light output. So with this aprehension in mind we purchased 8 bulbs to change the main house lights, and the lights over the medicine cabinet/sink and headed out on our trip. These 4000K lights are just right, they put out great light without the harsh glare. They changed a poorly lit main area into a well lit space that was pleasant to spend time in.The best part about these lights is the impact they have on battery usage. When running on shore power it was nice to not hear the inverter turn on with the lights. When we ran a two bulb incandescent fixture the inverter immediately turned on. I could run all 4 bulbs in the house lights all evening without any impact on the battery or noise from the inverter.Installation was a breeze, I was able to just swap out all bulbs in each fixture. The bulbs are a bit tighter fit, but a little wiggling of the bulb and it slide into the socket.These bulbs performed so well that our first purchase when we got back from our trip was another 8 bulbs to finish changing rest of the bulbs in the trailer.

So the light itself (the led's) are cool to the touch, I did however notice where the light plugs into the socket getsHot, not just warm, they are HOT. They are bright, and the fit the fixtures well, I am going to have to keep an eye on the sockets they plug into to make sure they don't start to discolor and get brittle.You hold your hand over the fixture with the fixture cover installed they feel cool to the touch like you would expect from LED's. Be aware the sockets get hot. I installed 12 in 8 different fixtures, some single bulb, some twin bulb, it did not make a difference, they all exhibited the same condition. I noticed there was no polarity requirements, you can put them in either way and they work. I even tried flipping them to see if they would run cooler (no change) I guess we will see long term how they work out.

These are the real deal, a quality 921 RV bulb replacemet, but LED. They just work, they are amazingly bright, energy efficient and easy to install. They will save you money especially if you are a seasonal camper and paying for your hydro outside your park fees.These produce little to no heat unlike the standard RV incandescent bulbs.I bought a four pack to try out and then ordered another 20 bulbs. If you want to save a few dollars on the bulbs order then on amazon.com.

Edit: knocking down from 4 to 2 stars because one of these bulbs died after just a couple of months and at this price point that is completely unacceptable. Seven more are still working.The price is hard to accept but after tryting two other very disapointing alternatives I am now very happy with 8 of these bulbs in my travel trailer. They are not perfect, I still see some weird hue shifts from the default plastic fixture lenses, but they are very bright with excellent colour reproduction and most importantly, they do not flicker. I will probably pony up for another 4.I did test the power consumption and it seems to me that although they start at 4W cold, they only consume about 3W once warmed up, with no discernible change in light ouput.