I haven't researched fluorescent lights, but I do remember from 40 years ago it was said if they were going to be turned back on in less than 20 minutes, less energy was used just leaving them on. True fact or urban legend, I don't know.
As far as computers being left on, there are a lot of opinions, the consensus being there is no single right answer. For an exhaustive sampling, go to:
http://forums.cnet.com/7723-7586_102-565116/what-s-the-best-for-a-pc-life-sleep-hibernate-or-shutdown/?tag=nl.e497I think Kim Komando (the Digital Goddess) says she reboots her computers a couple of times a week. This clears them out and makes them run more efficiently.
As far as surge protecters, they help with power surges. They probably won't help if lightning strike nearby. The best advice in a lightning storm: turn the computer off, unplug the surge protector power strip from the outlet, unplug the phone line from your modem, and unplug the TV cable and its surge protecter from the wall. I might start doing this, but what a pain.
Tom Quoting "Hackel, Richard" <rhackel@xxxxxxxxxxxxx>:
So it sounds like we've got the leave-the-power-supply-on question resolved. What about the room lights? We are divided in our unit as to whether it's better to leave the lights on in the 6 different camera rooms between patients, or more efficient to turn them off. I'd like to leave them on since we run in and out of these rooms all day long, and I think it can be confusing to patients also. Any energy advantages to leaving these fluorescent lights on? Richard ________________________________ From: optimal-bounce@xxxxxxxxxxxxx [optimal-bounce@xxxxxxxxxxxxx] on behalf of Hasan Omairah [shagroon@xxxxxxxxxxx] Sent: Tuesday, July 10, 2012 7:07 PM To: Optimal Freelist Subject: [optimal] Re: Power switch on TRC 50ex We have a TOPCON TRC-50IX as our main capture cameras for Color, RF, FA, & ICG. I know for a fact that turning the capture PC on and off quite often degrades your hard drive and making it more likely to fail overtime; earlier compared to a PC being on continuously, or a one that is turned off then on occasionally. We used to keep the machines on during the working days, and @times we shut them off just before the weekend. But we were asked by ITA department to leave ?em one so network admins can update, patch, and backup our servers during the weekend! Well; not so quite sure if the on/off procedure would have any effect on the camera parts like light source and power supply unit etc? But I know from experience working on different electrical machines that is not a good practice. So; leaving them on in my opinion is a good practice, and time saver, as said if you need to get some quick study shots then the machine is ready, and you don?t have to wait for it to initialize. Than?x Hasan Omairah AAS COT OCT-C CRA Riyadh, Saudi Arabia "Blessed is the man who has some congenial work, some occupation in which he can put his heart, and which affords a complete outlet to all the forces there are in him". -John Burroughs ________________________________ From: TSteele@xxxxxxxxxxxxxx To: optimal@xxxxxxxxxxxxx Subject: [optimal] Power switch on TRC 50ex Date: Tue, 10 Jul 2012 11:07:38 -0400 Cousin?s, One of the photographers has begun turning off the 50ex after every study to avoid the sound of the camera in their office. I don?t think it really matters if you leave the camera on all day or turn it off and on multi times. Perhaps someone has information which would enlighten an old dog photographer like me. Thank You, Tom Steele, CRA Midwest Eye Institute 200 West 103rd Street Indianapolis, Indiana 46290 317.817.1018 tsteele@xxxxxxxxxxxxxx CONFIDENTIALITY NOTICE: This message is intended only for the use of the individual or entity to which it is addressed and may contain information that is confidential and/or privileged. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by telephone and return the original message to us at the above email address From: optimal-bounce@xxxxxxxxxxxxx [mailto:optimal-bounce@xxxxxxxxxxxxx] On Behalf Of David C. 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