Grow box

Ok I'm building a 8ft tall 4ft wide grow box and I plan on growing 3 to 4 plants at a time I have 2 t5 4 bulb light setup and together they give off 20000 lumens will I need more light to grow I wanna get the best result possible thanks for your help

And is it good to mix t5 with led

it is enough. sounds like a nice setup! and yes it's alright to mix them, actually they will emit different spectrums for the plant to absorb