When led high bay first entered the market, the majority of ROI was due to reduced maintenance costs. Today, reduced energy consumption also contributes to ROI. The conventional lamp always consumes 40 percent of total energy usage in the typical warehouse. According to US energy association, the lighting could comprise up to 80% of a facility’s energy expenditure when maintenance cost is factored in with energy costs. The latest led high bay could reduce energy consumption by 30 to 50 percent, but the amount of the energy saved by the led high bay lighting depends on which type they choose.