How bright is bright?

avnerd · 11th July 2004, 10:40 PM

Greetings!
I wanted to start a thread to try to get a comparison of lighting setups going. My reason for this is to qualify what may or may not be bright enough for most people.
Obviously if you are going to be setting up in a basement with no external light in the room, you can get away with a low 150W bulb.
I, however, live in a 1000 square foot condo with lots of natural light leaking into my living room from the windows and a skylight.
My current setup is a 3M 6100 LCD Panel ( 640 x 480, 16M colour )sitting on top of a 3M 9850 Hi-intensity OHP with a 400W Halogen bulb. I can't watch anything on this until the sun goes down.
What kind of a MH bulb do I need to beat my current setup for brightness?

Tiarb · 12th July 2004, 03:24 AM

Well, 250w metal halide produces about 20000-25000 lumens, that's about 25% more then that 400w halogen produces. Also, it produces less heat then 250w halogen, so you could probaply quiet the system down a bit too with that kind of bulb. With 150W MH you'd get about 25% less light than with the 400w halogen, but you'd get whiter light, that would probably compensate a bit, and of course 150w MH doesnt take much to cool :\

And with 400w MH you'd probably double your system's brightness.

HB

rhynesince · 12th July 2004, 03:47 AM

Im using 3m 9550 rated at 4000 lumens using 400 watts halogen. Likewise, my projector is viewable and bright enough only on unlighted room. On dark scenes however, its hard for me to see the image and adjusting contrast or brightness on my video would not give me an acceptable good picture.I wonder if anyone of you out there has already tried to retrofit this same OHP model with a 250w HQI and gained considerable brightness after.

avnerd · 12th July 2004, 04:32 AM

Thanks for the advice. I think that I'll have to try to go 400W. While looking around, I noticed that a lot of companies sell 1000W MH bulbs, but don't seem to list the ballasts for them. Does anybody know what you would use to power a 1000W MH bulb? Has anyone built a system with one ( without burning there house down! )

The_Mazta · 13th July 2004, 12:04 AM

i think a 1000w is too much, way too much. 400 is a lot but is the max you want to go to really,

avnerd · 13th July 2004, 03:25 PM

Mazta, I think that you're right. If for no other reason than the noise from the fan that you would need to keep a 1000W bulb cool. I've got an electrician pricing a 400W ballast and bulb for me right now.

11th July 2004, 10:40 PM	#1
avnerd diyAudio Member Join Date: Aug 2003 Location: Canmore, AB	How bright is bright? Greetings! I wanted to start a thread to try to get a comparison of lighting setups going. My reason for this is to qualify what may or may not be bright enough for most people. Obviously if you are going to be setting up in a basement with no external light in the room, you can get away with a low 150W bulb. I, however, live in a 1000 square foot condo with lots of natural light leaking into my living room from the windows and a skylight. My current setup is a 3M 6100 LCD Panel ( 640 x 480, 16M colour )sitting on top of a 3M 9850 Hi-intensity OHP with a 400W Halogen bulb. I can't watch anything on this until the sun goes down. What kind of a MH bulb do I need to beat my current setup for brightness?

12th July 2004, 03:24 AM	#2
Tiarb diyAudio Member Join Date: Jul 2004 Location: Pukkila, Finland	Well, 250w metal halide produces about 20000-25000 lumens, that's about 25% more then that 400w halogen produces. Also, it produces less heat then 250w halogen, so you could probaply quiet the system down a bit too with that kind of bulb. With 150W MH you'd get about 25% less light than with the 400w halogen, but you'd get whiter light, that would probably compensate a bit, and of course 150w MH doesnt take much to cool :\ And with 400w MH you'd probably double your system's brightness. HB __________________ my stuff is at http://tweaknmod-av.tk

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12th July 2004, 03:47 AM	#3
rhynesince diyAudio Member Join Date: Jul 2004 Location: los angeles	Im using 3m 9550 rated at 4000 lumens using 400 watts halogen. Likewise, my projector is viewable and bright enough only on unlighted room. On dark scenes however, its hard for me to see the image and adjusting contrast or brightness on my video would not give me an acceptable good picture.I wonder if anyone of you out there has already tried to retrofit this same OHP model with a 250w HQI and gained considerable brightness after.

12th July 2004, 04:32 AM	#4
avnerd diyAudio Member Join Date: Aug 2003 Location: Canmore, AB	Thanks for the advice. I think that I'll have to try to go 400W. While looking around, I noticed that a lot of companies sell 1000W MH bulbs, but don't seem to list the ballasts for them. Does anybody know what you would use to power a 1000W MH bulb? Has anyone built a system with one ( without burning there house down! )

13th July 2004, 12:04 AM	#5
The_Mazta diyAudio Member Join Date: May 2004 Location: Uk	i think a 1000w is too much, way too much. 400 is a lot but is the max you want to go to really,

13th July 2004, 03:25 PM	#6
avnerd diyAudio Member Join Date: Aug 2003 Location: Canmore, AB	Mazta, I think that you're right. If for no other reason than the noise from the fan that you would need to keep a 1000W bulb cool. I've got an electrician pricing a 400W ballast and bulb for me right now.

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