4' fluoros work great for veg, if you have enough of them.

There should be some "make and model" type coding on the tubes. Google that info and see if you can't get the manufacturer's specs on the bulb to learn the actual color temp and/or spectral distribution.

"Blue" looking bulbs will work better for veg. 6400K seems to be "standard," but I've had good results with 5500K, as well as mixtures.

You can't really go by designations like "Kitchen and Bath" or "Brothel and Boudoir." (Or "residential" ) Go by the kelvin rating, which is the color.

As long as you don't have too high a percentage of "reddish" tubes (causes spindlier plants) it's hard to go too far wrong. Mostly 6400K is gonna be the popular answer here, though. Grows a nice stocky little bush, if there's enough light.