What are the advantages of photographic lamp holder? What kind of person needs a photo lamp holder?

When the light is insufficient, use a photographic lamp to fill the light, such as indoor lighting is not strong, at night, cloudy, etc. At this time, multiple photographic lamps can be used to fill the light, which requires lamp holders, while some variety shows and film and television programs shot in the studio all need photographic lamps, and there are many professional lamp holders, except floor-standing and roof-hanging ones.