| 摘要 |
In a system for converting sunlight to artificial light, the solar energy is converted to as much DC power as the light sources require (each light source including a ballast circuit and a lamp). If the solar power lags behind the power consumed by the light sources, additional power is supplied to the light sources from the mains. If the solar power exceeds the power consumed by the light sources, the excess solar power is converted to mains power.
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