I personally find a good par meter to be an excellent piece of equipment to have in the tool box... Is it a vital piece of equipment .. no... But when you are dialing in your environment I like to know exactly where I'm at... But that's just me... I like all the data I can get when I grow.Fuck the par meter. Just get a light that matches your square footage and dim or brighten as needed.
Par meter is really good for nothing, and an unneeded expense