You will get mixed answers on this. IMO, every living thing needs periods of rest, including plants. Others say otherwise. Many find that the overnight growth spurts that happen when plants have a period of darkness each night outweigh the growth of 24/7 light.
I'd suggest you decide for yourself - do some 24/7 and others with periods of rest, then over the course of the season see which do better. That way you won't be going on other people's opinions, but on your own observation.