Fred,

Why not two timers, one for each switch that controls two of the lamps?

Example

Timer 1 On: 10 am
Timer 2 On: 12 noon
Timer 2 Off: 4-6 pm based on need
Timer 2 Off: 9 pm

Total duration of light 1 is 9 hrs and combined is only 4-6 when you have all 4-5 wpg...

I do this with my 45 gallon that has two twin bulb floros and it works well.

You can still grow R. Macantha, just ensure it gets the most of the 'extra' light....

I hear you on the DIY closet kit and your wife's taste

Here is a pic of mine in the living room.

Good luck