Sounds like you are at least halfway there... 
Ari, phone call on line 2!K100Dennis said:There are 2 places on the K12 where checks need to be done and both are a pain. 1 being the coolant expansion tank level check, the other being the rear brake fluid reservoir level check. I check mine by using a strong torch (flashlight) to backlight the reservoirs I suggest some clever person needs to create an LED panel which could be installed behind each reservoir and operated by a switch when the pannier lids are opened (like the trunk interior light). No heat from the LED's so quite safe. Any takers ?
Exactly the problem I had last weekend, couldn't see the rear brake fluid fill level for love nor money... great idea Dennis! I'll take a working prototype from youK100Dennis said:There are 2 places on the K12 where checks need to be done and both are a pain. 1 being the coolant expansion tank level check, the other being the rear brake fluid reservoir level check. I check mine by using a strong torch (flashlight) to backlight the reservoirs I suggest some clever person needs to create an LED panel which could be installed behind each reservoir and operated by a switch when the pannier lids are opened (like the trunk interior light). No heat from the LED's so quite safe. Any takers ?
Here you go Dennis, online from the mainland (Qld)...http://www.ledshoponline.com/G4_MR11_LED_bulb.htmK100Dennis said:My original post on this was when I couldn't remember the US supplier of my side case reflectors - it was Rider West. I think LED's are available these day on flat boards for universal applications. I'm going to have a look at some electronics stores. Need more than 1 LED per reservoir I suspect.