function even_light_background, adus, gain, P1, P2

;+
; NAME:
;	even_light_background
; PURPOSE:
; INPUTS:
;	adus
;	gain
;	P1
;	P2
; OUTPUTS:
;	Background corrected adus
; INCLUDE:
	@compile_opt.pro		; On error, return to caller
; PROCEDURE:
;	Calculate (adus-P1)/gain-P2
; MODIFICATION HISTORY:
;	???-????, Paul Hick (UCSD/CASS; pphick@ucsd.edu)
;-

return, (adus-P1)/gain-P2  &  end