I always hate having to grab a flashlight to find something in the cabinets. I finally decided to install some LED lights controlled my magnetic switches in two of my cabinets. I will do more as I get time.
These magnetic switches are rated for 1/2 amp of current. I read many reviews of many magnetic switches complaining that they only work a few times, then they either won't light or won't turn off. The key is to NOT draw more current through the switch then it can handle and these switches handles about as much current as I could find... 500mA. Many switches of this type are only rate for 100 to 200 mA. My current design pulls 145mA at 12VDC.
Reed Switch and Magnet Assembly
I used two different LED lights in this install.
this is a 12" strip of bright white LEDS that pull 100mA. I mounted these vertically next to the door hinge area and it puts out quite a bit of light in the corner cabinet of my SHamrock 183.
12" 12 Volt DC Flexible LED Light Strips - White | NL-512CB-WH (NL512CBWH) | Distributed By MCM
this is a much smaller package of 3 white LEDs that only pull 45mA. I put this behind the door under the front bunk that leads to the front storage area.
3 Pure White LED Project Lighting Module | 11-2934 (112934) | Distributed By MCM
I got lazy and took power from a 500mA 12 VDC/120VAC transformer plugged into nearby outlet. I did not feel like I wanted this to draw from the battery 12VDC, as we normally camp with an electrical hookup anyway.
I will probably put another 3 LED package on this circuit further into that storage area which will pull 190 mA total.
Below is a very simplified circuit diagram of the circuitry I used.