HPS with naked arc tube?

[rave420]

Hello,

this is probably a stupid question, and hella dangerous, so i do not recommend anybody to even attempt this.









What would happen if the glass that surrounds the arc tube (the bulb) is removed? Does the glass serve any other function besides safety in case of arc-tube rupture? Is it filled with an inert gas like incandescents?
I read the wikipedia article, but i didn't find the information i am looking for.

 

[DiscoBiscuit]

Sodium gas excites the element allowing it to produce the color and HID. No bulb, oxygen in the air (and no sodium gas trapped in a vacuum) would cause the element to burn up quick w/o producing HID for any sustained time. Not to mention potential fire/electrical/ass hazard from a live circuit exposed and rapidly self destructing.

EDIT: forgot to mention the high pressure part. High Pressure Sodium. Even the name sounds like potential fireworks.

 

[ben ttech]

bingo...
the ELEMENT can only exist in it light emitting EXCITED STATE...
in the PRECISE enviroment the GLASS housing was manufactured to ensure...

one step back pilgram...

 

[sparkjumper]

I'd say you'd get hella lot more lumens if you just get rid of the "envelope" its purpose is to slow down your grow bro!Just kidding of course

 

[JackTheGrower]

The Safety aspect is the thing I think of first.

It would be an exposed device so that scares me.

I do understand what is being said: That energy is lost in glass.. I know very well.

I have used glass enclosed hoods.

I now have a 1k HPS in a cool tube and for that last bit of flowering energy I side light with twin cool tubes that have 250 watt MH's

I'm in a 4x4x3 CF organic soil grow box.

This side light system is untested as of yet but it makes an effort to improve the results I had from the last experience.

Just thought to share my story..


Jack

 

[sparkjumper]

Man thats a good bit of light in a small enclosure those cool tubes must be really effective

 

[tree d]

I've heard of people doing that with MH bulbs; cracking the outer envelope the reason was to allow more UV light to reach the plants......very dangerous and can give you radiation burns. Not much UV from HPS so I couldn't see any reason to do this.