Division 4.1 Calculate the power savings
United Kingdom
For each of the 5 measurements the power which is used is to be calculated by multiplying the installed voltage with the measured current. When a stepper motor or electronic controller is used for the supply of the electricity to the LED lamps, then the electric load of this component part is to be excluded from the measurement. This will result in 5 values. Each value must be expressed in 4 decimals. Then the mean value of the used power will be calculated, which is the sum of the 5 values for the power divided by 5.
The resulting power savings are to be calculated with the following formula:
Formula (1)
ΔP = Pbaseline – Peco-innovation
Where:
Power savings in W;
Power of the baseline;
Mean value of the used power of the eco-innovation in W.
Table 1
Power requirements for different baseline type of lighting
| Type of lighting | Total electric power[W] |
|---|---|
| Low beam headlamp | 137 |
| High beam headlamp | 150 |
| Front position | 12 |
| License plate | 12 |