Some questions I could with being answered if any of you can help...

Passive Intakes...

Light Proofing.....OK so what I've seen so far is the slanted 'grills' with the slants pointing downwards. Will that keep light out when its dark time in my chamber?

HPS Lights....

As previously mentioned I have landed two 400W HPS, however thinking this will give me heat problems. Can I fit a 250W bukb into the unit I have? Or will that be dangerous?

Cool Tubes/Heat Spreader....

Alot of difference pricewise. Is there anyone that has experience of both, that can advise of the difference made is worth paying the xtra for the cool tube? Also will a cool tube just fit into the existing holder I have?


Thanks guys for your help.

Blazed.