Put your light trap on the outside...sorry I didn't get back sooner. About the light, if you want a different method to hang it you could drill right through the top where the light will attach. Then you can use a nut and eye bolt with washer top. Not the most attractive way but you can always...
If you have the vent setup...HPS. That's just my opinion...solistek definitely...one of the best hands down. Great reliability, no noise, no fan to fail.
Just wondering if anyone has used one of these before? Any good?
http://www.ebay.com/itm/800X-500X-200X-60X-USB-Digital-Microscope-Endoscope-Camera-Magnifier-Inspection-/380814878291?pt=LH_DefaultDomain_0&var=&hash=item58aa55e653