What is the allowable error range between actual power and rated power of LED lights?
1. What is the lamp power deviation?
Lamp power deviation refers to the difference between the actual power and the rated power. Under normal circumstances, the actual power of the lamps and lanterns should be the same as the nominal power, but due to the production process technology and voltage and other factors, the actual power of the lamps and lanterns may deviate from the nominal power.
2. What are the domestic and foreign regulations on the power deviation of lamps?
In order to protect the rights and interests of consumers, China has also made clear provisions on the power deviation of LED lamps. According to the just revised "Architectural Lighting Design Standards" GB/T 50034-2024, the difference between the input power of LED lamps and the rated value should comply with the following provisions.
1) rated power less than or equal to 5W, the deviation should not be greater than 0.5W;
2) When the rated power is greater than 5W, the deviation should not be greater than 10% of the rated value.
Our ROKEE luminaires are generally larger than 5W, for which article 2 applies. The difference between the actual power and the nominal power must not exceed 10% of the nominal power. In other words, if a luminaire is rated at 100W, its actual power must not exceed 110W and must not be less than 90W.
The International Electrotechnical Commission (IEC) also requires in IEC 62722-1, paragraph 7, that "the deviation of the nominal value of the electrical parameters of a luminaire from the actual value shall not be greater than 10%".
The details are as follows:
7 Electrical data
Electrical supply data shall be provided for the luminaire and shall include the following:
a) rated supply voltage;
b) rated input power;
c) rated standby power;
d) rated emergency lighting charging power.
Rated power values shall be rounded to the nearest whole number for 10 W and above and shall be to two significant figures when below 10 W. When measured at its rated supply voltage, under conditions specified by Annex B, the electrical values shall not exceed the rated values declared by the manufacturer by more than 10 %.