XPost: sci.electronics.equipment, misc.industry.electronics.marketplace   
      
   On Mon, 22 Nov 2010 11:37:36 -0600, John Fields   
    wrote:   
      
   >On Mon, 22 Nov 2010 01:01:01 -0600, "Jane_Galt"   
   > wrote:   
   >   
   >>John Fields   wrote :   
   >>   
   >>> On Fri, 19 Nov 2010 13:58:09 -0600, "Jane_Galt"   
   >>> wrote:   
   >>>   
   >>>>Does anyone make a programmable appliance controller that can handle   
   >>>>fluorescent lights?   
   >>>>   
   >>>>I want to be able to program lights so that they always go off at 10 PM   
   >>>>but match the number of hours in the local day.   
   >>>   
   >>> ---   
   >>> I'm not sure I understand.   
   >>>   
   >>> Do you mean that you want the controller to always turn the lights on   
   >>> at something like "sunrise plus one hour" and always turn them off at   
   >>> 10 PM?   
   >>>   
   >>> What about daylight savings time?   
   >>   
   >>No, I want them to always go off at 10 PM and be on the length of the local   
   >>daylight. So, for example, if we have 7.25 hours of local daylight that day,   
   >>I want them to come on 7.25 hours before 10 PM and go off at 10 PM.   
   >   
   >---   
   >So how do you plan to determine the amount of local daylight on an   
   >ongoing daily basis??   
      
   Table lookup.  ;-)   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)