Awe fellas

This is my 3rd soil-indoor grow in my closet, It would be great if anyone could give me any advice if you can see any obvious improvement areas.

I germinate all my seeds before potting them into 22cm diameter pots that are 17cm deep. I do not use feminized seeds so I pull out the males when they have sexed.

My 1st grow I grew 3 random seeds which were probably swazz..and they yielded about 80g between all of them..the weed was nothing to speak of

My 2nd grow I grew 1 Sour Diesal, 1 White Rhino and 1 master kush. They each yielded about 50g. The SD and WH were amazing!! very happy with the quality, light green dense buds with lots of crystals and a beautiful smell The master kush was average and didnt smell nice.

My 3rd grow is now in process!! I am 5 weeks into veg and the 8 plants I am growing are between 10-20cm/4-8inches. (grow 2 had similar sizes at this stage) I am thinking another 2 weeks of veg.

This is My Grow Setup...

The closet:
It is 180x90x120(h) cm
There is lots of extra space around the plants..The plants are only in the center taking up about 90x90cm

The light:
400w MH+HPS

Ventilation:
1 extractor fan (30cm diameter)
2 regular fans

Temperature:
15C/60F at night and 22C/72F at day

The plants:
I have 8 plants, 2 purple power,1 white rhino,1 jack frost,1 hamster,1white rhinoxt44,1cheesext44, and 1 unknown 'mad chronic' plant that a friend insisted I grow

Watering and Nutrients:
I use tap water once a day as the lights go on. I use about 2-3 liters between 8 plants. The soil dries up everyday..

I use 'seagrow'(seaweed nutrient) during veg in every watering. Then Hortisol during flowering with every 3rd watering, and I feed it with sterilized bone meal twice through flowering.

Distance from plants to light:
The plants are between 14-18 inches from the light (34-44cm) and when they get taller I drop the level as the pots are on a platform placed on bricks so they will stay more or less that same distance.

The walls are white..I heard foiling is bad.

A few extra things are that I have pruned 2 branches on each plant with 5 bladed leaflets, and cut the white rhino's head off hoping to grow 2 heads.

I am also wondering if getting a 600w will be a better decision?..

I take pics once a week, I'll put them up.

I will also put up some pics of the 2nd grow, some pics are abit blurry though..

So that's it..let me know if you have any advice Thanks!!

I like it, it looking good, although is seems you may run out of vertical space for your lights if those bad boys take off. Godd luck.

The (1) 400W light you have should be suffcient for your set up as well.

Thanks for the reply, I'm only planning on letting them grow up to 12 inches below the light after I drop them to the ground.