Thanks for the info about these lights, Just got a roo 21DK and it has 8 or so of this particular light but only 2 of them have the switch in it. I like the main switch for all of them but sometimes we may only want one light on at one end of the trailer for various reasons so I was searching where to get replacements for the rest that had the switch.
Amazon doesn't seem to have them anymore but I found one seller on ebay that only had 4 left but then found this rv site
that was selling them for about the same price, with free shipping, so I ordered enough so all the lights in our roo can be turned off individually when needed and a couple spares to keep on hand. Just thought I'de post for anyone still looking, the color temp is nice, not too white like most leds but not as yellow as incandescent and they have a sleek minimal look I like.