what are the advantages of using special photography lights with strobes which sync with flash (like 23) for shooting over using simple video lights like baby and multi for shooting stills? I want to shoot portraits and renting out video lights is cheaper than photography lights.
I assume you mean continuous lights for video lights? Photographers do use them at times for studio/product work. Flash (or strobes) are generally preferred though as they can be portable (allows for location work) and more importantly, you can then choose to blend flash ambient (shutter speed controls how much ambient light you have in the picture) - shooting at or near max sync speed (1/200 or thereabouts) allows you to reduce the ambient or kill it completely. Small flashes (speedlights) can also shoot above the max sync speed (the flash 'pulses' as the shutter curtain travels across the sensor) - but you do need flashes that are branded to your camera to make this work, and the flash output (power) is considerably reduced, so the lights need to be fairly close the the subject.
