The RIGID Radiance+ SR-Series 10 inch light bar, with an RGBW backlight.

RIGID Industries — American-made off-road lighting, and the brand most often specified when the light has to survive what the vehicle survives.

The Radiance+ pairs a white forward-facing beam with a colour-changing backlight around the housing. The backlight is not for seeing by — it is what makes the vehicle look finished at camp, and it lets you run a low colour glow without the glare of the main beam.

RGBW rather than RGB matters: the added white channel gives you a proper white backlight as well as colour, so it works as low-level lighting rather than only as an effect.

Check your local road rules on both auxiliary lighting and coloured lighting — the rules on colour are often stricter, particularly on red and blue.