This is the list of monitors I have tested. The last two columns are based on a monitor being on for 18 hours a day and off for 6. I think that might be one I need to change to about 8 hours on.

      On               Power Off      
        Backlight or Brightness at Full Backlight or Brightness at Lowest Averages   Averages       Estmated power Estmated power
User Monitor Type Maker Screen Size White Black White Black White Black Bright Dim Standby Off usage per year cost per year
Travis LCD Samsung 16 28 27 13 12 20.50W 19.50W 27.50W 12.50W 1 0 114.35 KWH $9.44
CSE151-017 LCD HP 30 30 12 12 21.00W 21.00W 30.00W 12.00W 0 0 123.17 KWH $10.17
Chem Mon3 CRT HP 72 46 63 44 67.50W 45.00W 59.00W 53.50W 1 0 263.62 KWH $21.77
Mead 1 CRT Compaq 49 36 44 36 46.50W 36.00W 42.50W 40.00W 3 0 123.17 KWH $10.17
NCFL Comm CRT HP 19 90 68 79 68 84.50W 68.00W 79.00W 73.50W 0 0 397.76 KWH $32.84
Astrid CRT 82 58 73 58 77.50W 58.00W 70.00W 65.50W 2 0 339.42 KWH $28.03
Averages     17.5 58.50W 44.17W 47.33W 38.33W 52.92W 41.25W 51.33W 42.83W 1.17W 0.00W 156.07 KWH $12.89
Kilowatts per hour     0.06 KWH 0.04 KWH 0.05 KWH 0.04 KWH 0.05 KWH 0.04 KWH 0.05 KWH 0.04 KWH 0.00 KWH 0.00 KWH    
Cost per hour     $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00 $0.00    
Kilowatts per day     1.40 KWH 1.06 KWH 1.14 KWH 0.92 KWH 1.27 KWH 0.99 KWH 1.23 KWH 1.03 KWH 0.03 KWH 0.00 KWH    
Cost per day     $0.12 $0.09 $0.09 $0.08 $0.10 $0.08 $0.10 $0.08 $0.00 $0.00    
Kilowatts per month     42.71 KWH 32.24 KWH 34.55 KWH 27.98 KWH 38.63 KWH 30.11 KWH 37.47 KWH 31.27 KWH 0.85 KWH 0.00 KWH    
Cost per month     $3.53 $2.66 $2.85 $2.31 $3.19 $2.49 $3.09 $2.58 $0.07 $0.00    
Kilowatts per year     512.46 KWH 386.90 KWH 414.64 KWH 335.80 KWH 463.55 KWH 361.35 KWH 449.68 KWH 375.22 KWH 10.22 KWH 0.00 KWH    
Cost per year     $42.31 $31.95 $34.24 $27.73 $38.27 $29.84 $37.13 $30.98 $0.84 $0.00