Might be helpful to post some photos of my 29g tanks at various times, I have re-set these usually after a year or two if I move the fish to other tanks or something. These photos will give ideas on options. All have the same lighting, one 24-inch T8 Life-Glo tube. But the two CFL 20w should give you much the same in options. The last photo is the 20g with the two 9w CFL bulbs, just to show the light. This is my QT tank for new fish arrivals, and it is permanently running with plant bits and pieces culled from other tanks. Not much of a display, and the plants do improve when fish are present (the ammonia and CO2) but it shows the lighting is adequate.