Propane & Battery usage

Sure, the Putco page is hard to maneuver.  Do a google search.  Type in  " putco, led light bulbs for travel trailers."  On the result page go down about 5 entries to where it reads " putco  white 921 Type 360 degree Hi Intensity LED premium replacement light bulb."  Click on that link and you can read all the comments on the bulb.  You will read some negative comments but I am still sold on them 1 year after purchase.  A few of my friends who have purchased the same also have nothing but praise for the bulb. 
Some replied these are dim but IMHO if they were any brighter, they would be too bright.  Price is $ 20.16/pair on Amazon.  You can order them - look at the upper right hand corner to order.  Hope this helps.

Ray,

Those would work however the one I use is nearly identical in size to the one you have removed, so it will fit inside the lens nicely w/o having to fabricate an additional piece to hold it in place, as you would probably have to if you purchased the one you posted on your link.  My 1 cents worth.

Jim

I changed out the existing 921 bulbs with ones from Putco, go to their website or you can purchase them in pairs for $ 20.00 at Amazon.  I got mine from Putco last April, but friends of mine ordered theirs from Amazon (got the exact same thing) for the same price, I guess the choice is yours.  Expensive up front BUT, use very little off your battery AND they will last a long time AND they don't give off any heat AND they give off more light than the factory installed 921's.

Outbound sums up quite well our experience with propane and  battery usage.  We use a lot of lights and battery usage is longer because we changed all our interior lights to L.E.D.'s which only consume about 1 watt/bulb and are brighter than the factory installed ones.  At that rate we could use all our interior lights at the same time and still use about the same amount of watts as 1 factory installed bulb!  We camped out at Glacier for a week last September and had mid-upper 30's each night, furnace worked quite a bit, we only used them a night as we were hiking during the day.  We managed to get 12 days out of 1 tank, that included a fair amount of stove use for cooking as well.  We were thankful to have 2 batteries, they would run to about 1/3 charge after 4 days, after that we switched to the other. 

My experience has been: using my furnace in 0C-10C overnight temperatures, propane will last 4-6 days.  Running just the fridge on propane, on the other hand will last 20-25 days.  The water heater will consume a tank in around 15-20 days.