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# Front Projection Lamp Hours Question (1 Viewer)

#### Todd Smigelski

##### Stunt Coordinator
A friend of mine stepped up to a front projection system in his basement (Infocus 5000)and has stated to me:

"I think you have to pick and choose what you watch and make sure it's not a waste. I figured about \$5 an hour as you take life off the 2,000 hour lamp [I've spent about 13 hours]".

What the heck! Is this really the case in some situations?

#### Joseph Bolus

Senior HTF Member
The bulbs are generally rated for between 2000-4000 hours (depending on projector) and cost around \$280-\$350 (typically) to replace.

So ... I don't know where your friend came up with that \$5.00/Hr! It's more like fifteen cents!!

By the way, it should be pointed out here that most DLP and LCD based RPTV's also utilize bulbs which last in the neighborhood of 4000 hours and also cost around \$300 to replace.

#### Todd Smigelski

##### Stunt Coordinator
great help, thanks Joseph!

#### Leo Kerr

##### Screenwriter
The worst I've personally encountered are the lamps for the Christie Roadie S-12. In our experience (given arc current, building power, et cetera,) the thousand hour lamp typically lasts in the neighborhood of 900 hours, and costs us about \$4000.

The UHP type lamps found in most 'small' projectors are a different animal all together, and yes, generally last 1500-4000 hours, and generally cost under \$500..

Leo Kerr

#### Todd Smigelski

##### Stunt Coordinator
Well i think his math is correct...

A new lamp for his unit is \$405 and has a 2000 hour life.

2000hrs / \$405 = \$4.93hr ?!

#### RomanSohor

##### Second Unit
Actually, what you've figured out is how many hours per dollar he is getting.

\$405 dollars / 2000 hours = 0.20 per hour

2000 hours / \$405 dollars = 4.93 hours per dollar.

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