Some additional info on my installation that might be helpful-
My original double ceiling light fixture looked like this with a one position ON-OFF switch in the middle. I just replaced that switch with a three position slide switch from RADIO SHACK. This give me first position as OFF the middle position with ONE light on or BOTH lights one with BOTH lights selected. I wired my $4.99 LED board for the middle position. I also have a single ceiling lamp over the sink area and I just put the $4.99 ebay board in that one. If my Command Electronic boards ever go out I will replace them with the $4.99 boards.
I looked on-line for some fixtures that did this already without modification and came up with one that had two separate switches on it like shown here. This is a BARGMAN Dual Lamp fixture sold by AMAZON.
BARGMAN DUAL LIGHT Fixture - AMAZON
I never ordered one of those from AMAZON as my two ceiling lights with the radio shack switches works just fine as is.
I have to admit the regulated type LED boards COMMAND ELECTRONICs PN 170-111 which are 510 LUMEN Boards worked the best and you wouldn't have to worry about blowing a couple one for high DC voltage like when you are in BOOST CHARGE 14.4VDC Charge mode. Some of the guys replied back they was not getting RFI interference in their trailers using the same regulated board. My suggestion would be to order ONE and try it out maybe. My RFI interference was all being received in my OFF-ROAD POPUP which has fabric window flaps which is the same as you have... Your choice on that one haha... I also checked this on the work bench here in the house and it gave me RFI signals here on my ham radio gear.
In my radio operations I'm good to go with the $4.99 boards and after a couple of years of use I have a board that has one roll of three LEDs off now. If more go out on me I will will just replace the whole $4.99 board.
I am now only getting RFI interference from my INVERTER operations in the trailer. They are also very RFI prone. I can live with this pretty easy as the interference is usally only in the 7MHz band and is not on any of my used frequencies so far. This only bothers my HF radios. HDTV, NOAH, and VHF/UHF radios work ok with the INVERTER RFI noise.