General questions about growing on a PC box

[GrowForLife2]

1. On flowering, I know that I need to put the plants on a complet dark,
but how am I supposed to do that?
What ever I will do a little light always will go inside through the fans
Maybe should I put it on the closet? and if so, I need to keep it close all the dark time?
It doesn't need an airflow inside the closet?

2. How do I know the temprature inside the pc box when it closed?

3. Can I grow 2 or maybe 3 different strains on the same pc box?
It won't cause any problems in the future?

Thanks!

 

[Rifleman]

1 make a 90° elbow baffle for the fans, light can not turn a corner

2 thermometer

3 you can grow as many different strains together that you want...providing you have room. Can't imagine you would in a pc case.