Initial Set Up Complete Help Still Needed(Ventilation, Lighting, New growth questions

Hey fellow growers this is my grow ever. I've spent a lot of time reading up on things and was able to get a good start. However I still have some questions. Currently I have a grow box that is about 40" High - 28" Long -17.5" Deep constructed out of 1/4 plywood and some random wooden museum trays found at a scrap exchange store. I have 8 26 watt 6500 K light bulbs. 6 lights are attached to a power a strip via Y splitters. The other two are attached to one of those clip on light clamp. I have two plants currently growing and both are from bag seed from some random bud. Basically right now the grow box doesn't have any ventilation besides a big ass fan sitting in front of the cut out portion where the door should be. I have two 4 inch holes in the box one on the bottom right side and the other on the top left side( See pics). I also have the cut out portion for the door(picture). I also have a 4 inch inline fan. Also how are the plants looking? strangely enough the smaller one was planted before the bigger one.

My questions are...

How should I attach the door? I have weather stripping and cabinet hinges. Or should I just forget about the door and find an alternative.

How should I go about ventilating? Should I attach duct from the box to the fan then put a filter on the other side of the fan? and how many intake holes do I need to optimize negative pressure? Do I need small fan in there to circulate things along with the inline fan attached?

How should I do my lighting without really using anything that needs to be wired together? Is my current light set up good or should I space the lights out a bit?

Finally how are my plants looking? (8 days old small one 7 days old big one)

Also any general suggestions are welcomed.

Thanks so much I plan to document this grow so stay tuned for updates

Nice setup. I will attack the door question.

You could run a 1/4 half round, self stick weatherstrip around the opening about 1/4 to 1/2 inch from the hole and mount the door on hinges. You might have to run two rows of stripping. To check if you have a proper light seal, crank up the lights with no lights on outside the grow box. Make necessary adjustments to any light leaks.

Just out of curiosity what is with the picture of the white piece of paper?

Nice little setup by the way. Plants look fine/average for 8 days old, first month is kind of boring.

lol its not a piece of paper. Its the cut out portion of the box its just painted white. Thanks for the help so far

Here are some better pics of the box View attachment 2540105View attachment 2540106View attachment 2540107View attachment 2540108View attachment 2540109View attachment 2540110

Definitely use that 4 inch fan to exhaust the room I always like having my room under neg air pressure but that's just me

okay as far as creating negative pressure goes... I plan to seal up the front of the box as described above with weather stripping. Could I also seal it using like a car windshield reflector with velcro? has anyone tried that? Would it be relatively air tight? And I think I have to have a passive intake to create the negative pressure so how many intake holes should i have? I currently have one 4" exhaust hole top left and one 4" intake hole bottom right. Is that adequate and if not where should I place the other intake hole(s) on the box to maximize air flow.

That should be fine how many cubic feet of space do u have in your room and what is your fan rated at? As an example my tent has about 40 cubic feet of space and my exhaust fan pulls 125cfm as a result I have a 400w hips in there and no problems with heat