# Re: How to turn off lamp in ScanJet IIcx

David Mosberger-Tang (David.Mosberger@acm.org)
Mon, 22 Dec 1997 23:24:35 -0800

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>>>>> On Sun, 21 Dec 1997 18:43:14 +0000, Jonathan Buzzard <jab@hex.prestel.co.uk> said:

Jonathan> The flourescent tube in my Astra 600 has a lifespan of
Jonathan> only 10000 hours, the last time I looked the MTBF of an
Jonathan> LED was 10e9 hours or about ~1 million years. If I had an
Jonathan> LED lightsource you could leave it on forever, with a
Jonathan> flourescent tube this is not an option, especially if it
Jonathan> is not a user replaceable part. LED's last forever, I have
Jonathan> an LED clock that has been on nearly continously now for
Jonathan> 10 years

Don't know about others, but I simply power off my scanner when not
using it. SCSI can deal with this easily. Also, under Linux, if you
forget to turn on the scanner when booting the machine, you can
correct that mistake anytime by sending a string to /proc/scsi/scsi
(grep SCSI-Programming-HOWTO for "add-single-device" for details).

--david

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