[Ol' Bob]

Red light at night doesn't kill your night vision. White and other colors do.

The reason LED flashlights get so problematic is it is hard to make switches that don't get intermittent at such low current. This is the issue with low voltage lighting. Also, in DC circuits, voltage losses over distance are a real bite. The lower the voltage, the bigger your wire should be and the better your connections. Use solder, not crimp-ons or wire nuts. Use up what you save in watts in quality switches and fat wires.