If you are not sure the trick is to only buy ONE... Then if it is what you like then get all you need. You will need something in the 400-500 LUMENS rating and also WARM WHITE color to replace the current incandescent automotive type bulb. If the company doesn't list their LUMENS rating then you probably won't find it bright enough for you.
This is good place to read up on LEDs
I first purchased the COMMAND ELECTRONICs PN 170-111 which are 510 LUMEN Boards that stick up inside the DUAL and SINGLE Ceiling light fixtures - They put off excellent light. For my other sockets Porch Light- a couple of Bed Area lights I used the LEDTRAILER ROUND LEDs PN 921-380 which are 380 LUMENS. They are excellant lights as well.
All was going great for me until I did go camping way-back-in-the-woods and found that all of these regulated type of LEDs lights put off a small amount of RFI which in my case interfered with my weak radio and tv reception. With any LED light "ON" my OVER-THE-AIR HDTV reception would totally BLANK OUT. My NOAH WEATHER RADIO reception would not work as well. My Amateur Radio reception was very reduced. All of these Radio/TV units were on OUTSIDE ANTENNAS. When I turned OFF the LED light everything started working as before...
To fix this problem and with much help from CamperPaul, SMKETTNER, and KendallP along with a whole host of others I replaced half of my CEILING LED lights with a SMD BOARD 36-1210 type LED 252 LUMENS (Ebay from CHINA @ $4.99) that does not incorporate an ON-BOARD regulator that allows the board to operate between 8-30VDC using what is known as a BUCK REGULATOR circuit. I have tried a couple of these non-regulated boards and they work fine with NO RFI signals being produced. With my DC Voltage range of 13.2 to 14.4VDC they seem to work just fine but the experts tell me their life span may be reduced somewhat as their operating voltage range spec is not that high but at $4.99 each probably no big deal.
This is why you should only purchase ONE of whatever you get and check for these things in your trailer. What I run into may not be an issue for you at all???
I am very happy with the 4.99 EBAY/CHINA LED boards and after several years of use now I have one board that has two groups of three leds out. I will replace the whole $4.99 board one of these days if it gets dimmer.
You will have to satisfy yourself on what works best for you.
just my thoughts...