questions about a closet setup:

ok so my mom said i can grow some weed in my closet and i was just curious about a few things:

for reflective surfaces will tin foil be good? i was thinking of covering the interior in tin foil to keep the heat focused on the plant good or bad idea?


next, i was thinking of taking 2 plastic containters about 30 cm in length and 10 cm in width cutting circular holes in one and inserting the pot plant in a small circular conrainter with some holes in the bottom with soil so it can soak up some water , the next containter will have 2 more plants in it both connected with plastic tubing hooking up to the pump so create a circuit of water good idea or bad?



finally i was wondering quick question 20-20-20 i see fertalizers with these numbers i know the last number is potassium but what are the first 2 numbers?


i was thinking of useing a 500 watt floresent lamp but if i did i wouldnt need that tinfoil but im kinda worryed about having a fire break out if the lamp gets too hot so i would like some imput on what to buy




any extra imput you think im neglecting will mean alot of mentioned i have a budget of 900$ canadian to spend on this

 

thanks for the advice ill take it also i was wondering i dont want to buy seeds and risk getting a male plant how hard is it to find somone who sells cloned females?