LED replacements for 921 bulbs

[audriver]

The ceiling lights in my Winnebago Sightseer are oval fixtures, each containing two 921 incandescent bulbs. I would like to replace the 921's with LED's. In order to maintain the same approximate level of illumination, I think I will need to use two LED units in each fixture. I have experimented with a couple of Diamond 52432 units, each of which has 25 LED's. Two of these will not fit in the fixture without some modification to the fixture. Specifically the bulb sockets would have to be moved further apart, which appears to be doable.
Before I start modifying my lights though, I thought I would ask if anyone knows of an LED replacement that is the same approximate length as a 921 bulb (which is about 1 3/8"). Also there is about 5/8" between the 921's when installed in the fixture, so the replacements could be as much as 1 3/4" long and two should fit without any modification. Additionally I think I would need warm white color LEDs. Thanks for any help.

[GG1]

Try this site technorv.com, they have been very helpful in selecting replacement bulbs. They have measurements in mm for all their bulbs as well as enlarged views with videos. There are also several helpful led suppliers posted on this web site all of which will answer your questions

[rsflight]

I replaced my 921s with a 68SMD LED light. A single light seems to match the original bulb. I chose the cool white color, it has a blueish tint. It was a simple plug in. Mine came from eBay, $5 each.

[ronjhall]

I installed some 12 5050 LED's off EBAY. They work well because all the LED's are pointed down. 5050 LED's have 3 LED's in each square. You can order a set to see if they will work for you.

[Bbspinstl]

Originally Posted by rsflight

I replaced my 921s with a 68SMD LED light. A single light seems to match the original bulb. I chose the cool white color, it has a blueish tint. It was a simple plug in. Mine came from eBay, $5 each.

What vendor did you use to purchase the lamps from?

[rsflight]

I mostly go by price. The first set I got were biased to run bright but that also meant they were hot to the touch. The heat killed them. They became slightly dim in a year. The latest batch came from this Ebay Store. I haven't tried them yet to see if they operate any cooler.

[Shadowcatche]

On Tear 1 I use SMD arrays double stick taped to the fixture with an adapter for the socket. All of the light is downward. It worked very well.

[CampDaven]

Me. 2 yrs. 12 halogen bulbs. About 12 bucks.

What is the hype here?
Just sayin....

[davismills]

I have a Sightseer 2011. Replaced my oval light fixtures with two each from this vendor on Amazon.
Amazon.com: HQRP T10 168 194 912 921 2825 W5W Wedge Base 15 LEDs SMD 3528 LED Bulb Cool White Tower Type plus HQRP UV Chain / UV Radiation Health Tester: Automotive