Most  lamp dimmers usually follow either a log law or µ law curve.  
-----Original Message-----
From: David Duffy <AVD@UQ.NET.AU>
To: PICLIST@MITVMA.MIT.EDU <PICLIST@MITVMA.MIT.EDU>
Date: 01 May 1998 08:28
Subject: Pic Lamp Dimmer

>snip<
>each type of lamp will have a different power/intensity curve but is there
>a general purpose 'average' type of curve available out there ?
>Regards...
>
>_________________________________________________________________
>Dave Duffy      Audio Visual Devices        E-mail: AVD@uq.net.au
>Phone: +61 7 38210362                   Facsimile: +61 7 38210281
>Unit 8, 9-11 Trade Street, Cleveland, Queensland  4163  Australia
>_________________________________________________________________
>