Do I have to buy a flash for photography?

It is best to use flash lamps, fluorescent lamps, etc. The color temperature is not accurate, it is not easy to determine the color, and it is also easily affected by ambient light. It is still hot in summer.

Great difference! Fluorescent lamps should be preheated for half an hour, and the color temperature tends to be stable after half an hour, half an hour! Time is money, brother! The flash can be used immediately! Besides, your light bulb is too small, at least150W.