m0useanswered grow question a year ago Use sunlight and supplemental lighting even CFL bulbs from general store till new light arrives. I've purchased bulb splitters before and make a light like this.
That is if the plants are already growing, you want to keep the dark cycle under 10hrs to prevent it from going into bloom any light works as long as its on.
I've used some shit grow lights before and chain them all together and they did well before getting my current lights Got nice yields off of them.
Medic grow has some nice entry level lights that I'm using in my tent. Mini Sun 2, they treat me well. the 150W one would be ok, I don't know your tests size but 400W might be to much unless its a 3x3 or 5x5, Mines a 2x4 and I use my lights at max 60% dim total is 400w. They have a lot of sales on their lights all the time. and if you reach out to them and say you saw m0use growing with their products and your interested in a special price they may give you something that's not advertised. Right now the have a merry Christmas sale on.
Good Luck!