They call the entire span of these components the spectrum. So each different colour can be as 1degree of Light. We may conclude that the Bible uses colours instead of percentages to evaluate Light. Horse God is also fire. Mount Sinai was covered with smoke, because the LORD descended on it in fire.
Fire gives heat energy plus light.
However, we can change fire in work more easily than light. Engineers build engines for that purpose. Horsepower can measure the power of engines also. The rest of it goes to heat - to warm exhausted gases, a vehicle's body and its surroundings. However, it should not be so with God.