TIZIA, pink rozay

That will be fine with light you have up until a point. Then I would definitely add the other 125w come towards halfway through veg. Hope this helps.

Oh and tent size you should be able to get them in but it will be packed but your not really running alot of watts so size of plants will be smaller comparatively

I would definitely increase the amount of light, the more light the better the more DLI the better if you have all the other parameters in check but if you're using the 125W for just sprouting adding a 2nd will only help but download tent buddy to make sure you're in the right range for PPFD and adjust you light distance accordingly, best of luck