From what I know lumens dont add together they are just what ever the highest is! If your 23 watts are making 1600 lumens and the 26 making 1730 (not exact figures) then all the lumens you have is 1730 from that bulb and 1600 from the others! Check it out but it just something I read from a good source!Here is the tally-
Door closed:
(7) 26 watt 2700k CFL
(1) 23 watt 5000k CFL
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( 8 ) lights, 205 watts total, 13,500 lumens, 2769 lumens/sq ft.
Door open:
(7) 26 watt 2700k CFL
(4) 23 watt 5000k CFL
(4) 26 watt 6500k CFL
-----------------------------
( 15 ) lights, 378 watts total, 24,700 lumens, 5066 lumens/sq ft.
that doesn't sound right, im sure the more the better either way tho.From what I know lumens dont add together they are just what ever the highest is! If your 23 watts are making 1600 lumens and the 26 making 1730 (not exact figures) then all the lumens you have is 1730 from that bulb and 1600 from the others! Check it out but it just something I read from a good source!