"James Sweet" wrote in message
news:1DCid.3454$xO1.1411@trnddc08...
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|
| 2000 hours does not sound like a lot. What are the failure modes on a EL
| display? Its not like it has a filament that burns out

| The phosphor depreciates, the same happens with fluorescent lamps, the
lumen
| output steadily depreciates over the life of the lamp (but power
consumption
| remains the same) as the phosphors age. This is why most businesses
replace
| lamps after a set amount of time rather than waiting for them to fail
| completely. Places that do that turn into a cave because half the lamps
are
| so depreciated at any given time. EL phosphors wear out even faster.

The real reason why I would replace all the lamps after the first one or two
failed is that it's easier to get the ladder etc. out once, rather than do
it over and over as the lamps fail.

N