The main technical terms of energy-saving lamps - light decay

The flux is decayed for a certain period of time. That is to say, it is 55 lm/w at the beginning, and it is slowly reduced to 50 lm/w, 45 lm/w, etc. Until there is no brightness, a good powder has a slower decay, such as: Good three-color toners only attenuate 10% in 1000 hours and 2000 hours to 20%. However, the poor powder, like the phosphor, began to attenuate in 100 hours. In 1 month, it was almost half. After 1000 hours, there was no brightness, which meant that the life span of the energy-saving lamp was over.