VW Crafter Or Mercedes Sprinter rear interior led light

This is a easy solution to a lack of light in the back or a vw crafter or mercedes sprinter van, this thing fits into the empty hole above the rear doors and connects straight to the existing interior light .
The leds are 6 parallel sets of 4 leds in series ( total 24 leds ) this configuration means no need for any resistors. Each LED vf is about 3v so all is good.