How many watts of flash is suitable for shooting a full-length portrait in a 2.7-meter *3.5-meter studio? Will Nikon d5200 and AF 18-55mm be enough? If not, please recommend it.

The so-called enough depends on your requirements for photo quality. This camera is really enough for enthusiasts. If you make money from it, you can only take very, very ordinary photos.

My cabin is a little bigger than yours. For such a small shed, any domestic 300w flash is enough as the main light. Although I usually use a 600W flash, I have also used a 300W flash. Plus a 90cm octagonal soft box, it is no problem to shoot a full-length portrait lamp. God Bull, Golden Cup and Golden Eagle are all cheap and easy to use. However, the problem with this shed is that the full-length portrait always uses wide-angle ends, and the portrait deformation will be more obvious.

Shooting parameters: camera: shutter speed1125 second aperture: 7.1-kloc-0/1commonly used for 8 ISO: 100 photo format: RAW color space: sRGB without post-processing, AdobeRGB with post-processing.

You can go to my website to see the films shot with this parameter, many of which are shot with 300W light.