Why is the floating range of the watts number of the DY21002 Wall Lamp 10%?

In the specifications of electrical equipment and lamps, the wattage (power) usually has an allowable floating range. The wattage of the DY21002 Wall Lamp is marked as 7W±10%. The existence of this floating range is not accidental, but is based on a comprehensive consideration of multiple factors to ensure the performance and safety of the lamp in actual use.

1. Differences in manufacturing processes
During the manufacturing process, although the manufacturer will try its best to ensure the consistent performance of each DY21002 Wall Lamp product, due to slight differences in materials, processes and equipment, there may be certain differences in the actual power of different batches or individuals of DY21002 Wall Lamp products. This difference is within the allowable floating range, which can ensure that all DY21002 Wall Lamp products meet the basic performance requirements and avoid a significant increase in production costs due to overly strict standards.

2. Characteristics of electrical components
The performance of electrical components in DY21002 Wall Lamp, such as LED chips, drivers, etc., is also affected by factors such as temperature and voltage. Under different working conditions, the actual power consumption of these components may vary. Marking the floating range of the watts number can ensure that the DY21002 Wall Lamp can operate normally under various working conditions, and its performance or life will not be affected by slight changes in power.

3. Safety and compatibility
In actual use, the DY21002 Wall Lamp needs to be compatible with various power supplies and circuits. Since the voltage and current of different power supplies may fluctuate to a certain extent, the actual power consumption of the DY21002 Wall Lamp will also change accordingly. Marking the floating range of the watts number can ensure that the lamp can still work safely and stably under power fluctuations, avoiding safety hazards such as overheating and short circuit caused by power exceeding the design range.