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*****Assume that a T8 4’ fixture with 2 x 32 watt energy saving lamps operating in corridors/stairwells and etc. for 24 hours, 365 days for 5 years (43,800 hours).
* BC Hydro’s rate will be increased by 17% over 3 years or by 5.4 % in each year.
** BC Hydro’s rate increases are unknown for these years.
Years |
Hours |
BC Hydro rate kwh/$ |
T8 4' tube 2x32W |
T8 Annual energy cost $ |
LED T8 4' 2x18W |
LED T8 annual energy cost $ |
LED Energy savings $ |
2012 |
8760 |
0.1 |
0.064 |
56.1 |
0.036 |
31.5 |
24.5 |
2013 |
8760 |
0.1054* |
0.064 |
59.1 |
0.036 |
33.24 |
25.9 |
2014 |
8760 |
0.1111* |
0.064 |
62.3 |
0.036 |
35.04 |
27.3 |
2015 |
8760 |
0.1111** |
0.064 |
62.3 |
0.036 |
35.04 |
27.3 |
2016 |
8760 |
0.1111** |
0.064 |
62.3 |
0.036 |
35.04 |
27.3 |
Total for 5 years |
43800 |
302.0 |
169.9 |
132.1 |
* BC Hydro’s rate will be increased by 17% over 3 years or by 5.4 % in each year.
** BC Hydro’s rate increases are unknown for these years.