new grow 1st real effort need advice with pics

veg chamber specs: 2.5x2.5x3ft with 1 400w mh with the smaller of the 2 sizes of 400w bulbs
flower chamber specs 2.5x2.5x5.5ft with 1 400w mh with the large size of 400w bulb
veg chamber stays at around 30*C and 45% humidity with 24/7 lighting.
ive got the heat from the veg chamber vented into the flower chamber keeping it at a good 30*C aswell.
due to the fact that it is the dead of winter in canada and my growbox is in an outdoor shed Im quite pleased at the way emergency blankets are holding the heat!!!
i would like some advice on how many plants to veg at one time and how many to flower in order to utilize the space properly and get the most consistant amount of harvests

the 2 pics are at 16 days veg and the last one is at 15 days look at the growth in 24hrs

personally id get rid of the tin foil to prevent any burning on the leafs

i have no problems with burning of the leaves and also those are mylar emergency blankets. but thanks tips