Bare Bulbs VS Ventillated Hoods?

[mydnytetoker]

I need advice on whether to run my bulbs bare or use ventillated hoods. Here are the specifics of the flower room in question:

10' x 12' with 8' ceiling. All surfaces are covered in white poly sheeting. Room is sealed. I'm running coco, handwatered to waste for now, but am currently assembling parts for a RDWC system. I have a 12kbtu ductless ac system installed and will be running 2kw of HPS Hortilux bulbs (hope to add 2 more 1kw bulbs soon). I have plenty of oscillating fans for air movement as well as a carbon scrubber for when it gets stinky.

I have heard from a few people that you lose a lot of light with reflectors (hoods) since a lot of the usable light shines into the duct openings of the hood. Makes sense. So I guess my question is: Would it be preferable to run with or without a hood? I know my ac would be running a bit more without a ventillated hood, but I plan on adding CO2 soon so I can run warmer temps. But I want to maximize my yield and if I can get more light to the plants, I wouldnt mind using more ac.

Thanks in advance.

 

[FreezerBoy]

Running a lamp horizontally without a reflector throws out 75-80% of the light.

Avoid reflectors with ports at the sides or top. Look to those with ports at the ends. Lamps throw light perpendicular to the shaft, forward they throw shadows, aft next to nothing at all.

 

[sparkjumper]

I love the vertizontal for flowering its a 4 ft parabolic with a horizontal lamp.If you are going to use co2 and use recirculating AC system I'd go with a vertizontal.You need more light though I run 3 vertizontals in an 8 by 8 room

 

[inphu510n]

Running a lamp horizontally without a reflector throws out 75-80% of the light.

Avoid reflectors with ports at the sides or top. Look to those with ports at the ends. Lamps throw light perpendicular to the shaft, forward they throw shadows, aft next to nothing at all.

Thanks I hadn't contemplated that part. I guess this means that the few reflectors which have offset ports at either end of the reflector are bad as well. Examples being the Yield Master 2 and the Sunlight Convertible Reflector.

 

[FreezerBoy]

I've never seen a 4 port model like the YieldMaster before. I suspect it's better than side ports but, I've no idea how it compares to 2 end ports for reflectivity or cooling. All the Sunlight Convertibles I find on Google are 2 port, one on each end.

 

[mydnytetoker]

Thanks for the input guys. I guess I will leave the reflectors in. I was hoping to NOT have to run ducting to reduce clutter in the room.