you must have at least 1 white light
If your furnace is opperating correctly and the vent is in good opperating condition, You can run the furnace non stop forever.
because you touche yourself at night...
The color light that is optimal for enhancing the performance of a night vision camera is infrared light.
The color light most conducive for promoting a good night's sleep is red light.
A white light is the color of light that must be displayed on a vessel towing at night, I t must be displayed at 8.2 feet higher than the colored sidelights. It should have an all round white light visible for 2 miles.
White
When operating a powerboat at night, the port side(left side) should display a red light. The starboard side(right side) should display a green light.
White
White
green
A White light