Silver Duct and Light Pollution

[fireburner23]

I am trying to figure out how to get some 4" or 6" duct that doesn't reflect light. I used the insulated duct before, but the insulation sucks and it is a pain in the ass to cut and size. Some silver duct work with a interior black color would be great.

Does anybody know where I can find something like that?

 

[ZZTops]

This is Black on the inerior but still reflecs a little so I do a bend back on the end...

http://www.discount-hydro.com/productdisp.php?pid=305&navid=29

 

[rick shaw]

Black spray paint will do the job.

 

[fireburner23]

Black spray paint will do the job.

I would prefer to buy something already premade. Makes it less work for me.

 

[tequila_sunrise]

Just add a "S" bend into your ducting.