What's a good tool to cut holes with?

[theyorker]

A wise man told me always have a goal in writing!!! I'm using all flourescents for my grow and so far I'm very happy with the results. I hope it comes out great for you mang.

 

[dontknowmuch]

What are the kleenex boxes on each side of that rubbermaid for?

Also I am doin ok with all cfl grow

 

[user 5533]

On the one in the picture they are passive air intakes... I have mine made of the duct tubes, with screens on the inside to keep out any little bugs or critters.