150watt hps in a metal cabinet grow

So ive put the sprouted seeds into a jiffy pellet and currently letting them sit under the HPS light with the metal cabinet door open and a fan blowing inside. If i close the doors for any reason when the lights are on the temperature goes up to 105-110 F but as long as i leave it open and have the fan blowing at full speed then the temp is around 90F with 40% humidity. Heres the pic of my growroom, ive used boxes and stuff to hold the HPS lamp up because i dont know how to mount it to the top of the shelf and im pretty sure i need to find some sort of thin but strong stand that i can let it sit on. is 90 too hot? this is my first attempt so im using 2 seeds i got from some bud i bought at a ghetto, if the grow is good ill plant my white widows and at least 4 plants at a time.

i always keep the airconditioner on and have a celing fan in my room on as well, also both windows are open to let in fresh air.

the black thing in the middle is the seed in the pinched closed jiffy pellet about 7 inches from the light.

ok well i got rid of all the clutter cus i figured the boxes were trapping heat and i put the light on a little stand to the left. this brought the temperature down to about 88-90 then i improvised a plastic cover/shield to put over the HPS bulb because it didnt come with a tempered glass cover (which i will buy) and now the temp is down to about 80F which imo is perfect. Ive posted a pic of my new setup.

Only thing im wondering is how im supposed to get the humidity up to around 65 like it suposed to be? if i close the doors to the cabinet then the temp will skyrocket 20deg in a matter of minutes.

thats what im worried about, any help?

but this area im growing in is just for the vegetative state, once they are big thick strong and ready to flower ill hang them by a metal pole in my closet so they can grow big and heavy. but im not there yet. im just apoor college kid living in a state where bud costs $40 a gram.

one thing diy cool tube. also mh for veg hps for flower. I hear you can use a hsp but mh works far beter for veg.

ya i coulndt afford a decent MH one. i got a full all in one set of the 150watt hps for 89$, no shipping, no taxes, from growlights.net. cant beat a deal like that, ill get a MH once i get some more $$ and get better at growing

bet you could mod that hood get a peice of glass cut to fit and run air in and out. can't say how much it helped my 400w. But you do with waht you can. I just keep adding to my stuff next is a 600w for flower. I was just thinking in that box your using you could build a simple frame for the box and get a peice of glass to fit your frame. then you wouldn't have to mod your light at all. then just run air in and out of the top of your box.

ya but i have a small space, im gonna just improvise some thing with a few holes poked in it, the temp has dropped down to 78 degrees now from just covering it halfway with a cheap piece of plastic. without it it was 90-91. so i bet some thing else would work better if i can think of it, cus a glass enclosure without proper ventilation is gonna cause failure of the bulb and parts. ill stick with my cheap plastic for now

also, ive read alot that the urea in urine has alot of NPK but ive read u have to dilute it about 8:1 or 10:1 or itll burn. Is that 8:1 water:urine or urine:water? im guessing the former but id like to be sure

also, is there any quick and easy way (eating or drinking certain things, or taking certain vitamins) to increase the safely increase the urea in urine in a ratio level that bud would like while keeping the biuret amount 1% or less?

venting was in the plan but what ever. No big deal. Good luck with the urine.
LoL go spend 10.00 on some alaskan fish fert. would have about the same smell level and lots of other good things for your plant.