SHP/UHP Lumens .vs Metal Halide Lumens?

[M3WOLF]

Hello everyone. First off, just wanted to say great forum! A plethora of information! I've searched but couldn't find an answer but I might have phrased my terms wrong, so I appologize if this has been covered. Just wanted to confirm my guesses.

I'm trying to replace the light source on a COMMERCIAL PROJECTOR which uses a 200W SHP with a 70W Metal Halide which outputs 4000 lumens. The projector supposidly outputs 750 lumens. I realize that that measurement was probubly measured from the output of the projector and not the bulb but...

1. Would 4000 lumens be a sufficient replacement for the stock bulb? If anything I would think it would be overkill.

BOTH lamps have a 6500K color temp.

2. What does SHP or UHP actually stand for anyway? Are they mercury based lamps?

Thanks for any help!

 

[ywh]

1. some one has done it in some forum, the ballast is electromagnetic, not the original ballast.
that is not good, the light is no a point lighe

2. SHP and UHP are super high-pressure mercury lamp, SHP is DC lamp, the - electrode is biger. UHP is a AC lamp, the two electrode is smaler, same size

 

[M3WOLF]

Thanks for the response. What do you mean by "the light is not a point light"?

The actual bulb I was planning to use would be a EYE/Iwasaki Color Arc MT70D or maybe a MT100D with a reflector.

 

[M3WOLF]

bump

 

[superdaveumo]

What he means is the bulb has an arc (where all the light comes from). The fresnels (the collecting one, the one that spreads the light from the bulb across the LCD) work best with a single point of light (light a pin point). The closer to that pin point the arc is, the better the fresnel will work with the light.

So, with that in mind, when you have a wider arc, your light distribution is worse even if it's a bright bulb (to a point of course).

 

[ywh]

hello !
I am in holiday! I am in net bar.
I am going to come back in sunday,sorry! I have no time to reply now.