Can a flash replace a photographic lamp? How can I soften the flash?

The power difference between flash and photographic lamp is quite big, and the maximum power of external flash is 60w. If you want soft light, you can jump the flash. The principle is that the incident light of the flash and the lens should not be parallel. Add a soft light device. There are soap boxes, flash masks and sulfuric acid paper on the market, but the effect of taking portraits is not obvious, because the flash power is still not enough and the light is concentrated. .