FIGURE 4 Example of EnergyPATHWAYS Stock Rollover Method for Lighting Note. Although overall lumens of light increase over the model period, replacing less efÏcient lighting with higher efÏciency LEDs results in a reduction in final energy for lighting. In the final step, annual energy is multiplied by a unitized service demand shape for each subsector and summed across each model region. FIGURE 5 EnergyPATHWAYS Projected Subsector Shape Note. The overall hourly load demand is the product of the total energy demand at an end-use level and a unitized shape for that end-use. SPP FUTURE LOAD SCENARIOS | EVOLVED ENERGY RESEARCH | 10