Select Tiger72_B for your light. And apply it to  Tiger72.  You should have something that looks like this when you finish (29).

Continue to apply lights to each layer.  I have included a set for each one but Mid Fore Grass.  Use the Mid Grass lights for it.  When applying lighting effects try to visualize the way sunlight filters through trees in the forest.  If you can emulate this natural effect your paintings become more realistic.  Basically when it comes to lighting there will always be different opinions on how it should be accomplished. 

I made additional adjustments to some of the layers.  In the Controls Adjuster palette (30) adjust the Opacity of the Far Leaves layer to 30%.  Adjust the Opacity of the Mid Far Leaves layer to 35%.   In the Mid Leaves layer move the Opacity slider to 90%.  Click on Effects/Tonal Control/Adjust Colors… The Adjust Color dialog box appears (31).  Set Saturation to 1% and Value to –21%.