1.2 analysis of electricity used before change and after the change, fluorescent lamp, T8 size 36 watt tube LED T8 Size 18 watts. A case study of the parking lot P-1A - P-10B Thai summit tower building, it was found that in comparison of the electricity used before change and after switching from fluorescent lamp A T8 size 36 watt tube LED T8 Size 18 watts, there are differences at the level of significance that 0.05 when considering the average. Found that the electricity used before the change, the average more than after the change from halogen lights up a T8 size 36 watt tube LED T8 Size 18 watts.
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