This multi-color changing RGB Illuminator unit has 4 heads which means that if you have a project that has two GloTrim light pipes like in a seat top and bottom you can have light changing effects like fade in fade out or set it to a single color mode. These units are only 2 watt total which means 1/2 watt of power is pushed out per head. our single color compression fit LED's are brighter at 1 Watt difference keep in mind