Lamps (not bulbs)
Lamp technology has gone through significant leaps in technology over the last several years,
and the new technologies have created much longer lamp life, and a host of other caveats and
pitfalls.
I feel a mini-article coming on, so here I go:
It used to be that a projector manufacturer would say 1,000 hours was the “expected lamp life”. In
reality, you got about 450 hours that were good, but the drop-off in brightness was significant, and
they rarely lasted the rated 750 hours. Typically, these were the old 575-Watt Metal Halide lamps
that had this problem. Also, the max brightness was between 500 – 750 lumen.
Then the 180 watt Metal Halide lamps were running much lower brightness – about 150 – 300
lumen, but would get an astounding rated 2,000 hours. In all reality, they really only lasted about
1,500 hours, but also had the problem of having serious color shift issues after the first 75% of
the lamp life and a dip to up to 50% loss in brightness.
Next came the 1,500 hour Metal Halides that would burn much, much brighter – up to 5000
lumen, but were thousands of dollars a piece.
More recently, the UHP lamps hit the scene with 2,000 hours and very little color shift over the life
of the lamp. These are produced in a number of variations from different manufacturers, but all
have a few quirks (you didn’t think they were perfect, did you?).
If you’ve been looking at projectors for a while, and been primarily using them to display video,
you’d notice right off that these new ultra-efficient lamps were, well, blue. As in, the whites were
really more of a very light shade of blue. Those old pesky Metal Halides, for all of their issues,
really made video look much, much better.
Continue >>>
Used by churches all over the world to help teach worship, the Experiencing Worship study can help your worship team too.
Your team will learn why we worship and gain a better understanding of how to worship.
One user said..."Your 5 week study course has made a tremendous impact on my life in the study of worship... I would like to express my thanks for a well written study course that leads into a higher realm of praise and worship."
This is the debut album by EXW friend Paul Langford. Paul is a Chicago based singer, arranger, keyboardist, producer and conductor. Paul has a career that spans 14 years. Paul's work includes arranging for groups like GLAD, Voices of Liberty, VoiceTrek, The Chicago based "Caroling Party" and Day of Discovery Singers. His arranging has appeared on recordings side by side with greats like Gene Puerling and David Maddux, and he has sung with Don Shelton, Bonnie Herman and Bob Bowker, among others.