When high-pressure sodium lamps are used for a long time, their power consumption will increase. This is because the evaporation of the filament and the chemical reaction inside the lamp tube will cause the resistance of the lamp to become larger. Then the power consumption will increase. Besides, the brightness of the lamp will dim. The lamp tube and filament need to be replaced regularly.
Solar street light batteries have a certain lifespan. Does that mean I only need to replace it when it is expired? Or do I need to check it every so often?