We have experimented with different kinds of light for leafy greens and found that high temperature T5s to work really well. You will need about 50 Watts per square foot. Keep the light close to the plants. Using low temperature T5s for flowering plants is not advised as the light needs to be high and directed down to the plant. Fluorescents are not easily focused and tend to diffuse light to where you don't need it, thus the need to keep them close to the plant canopy.

As for flowering plants, during the vegetative stage, go with Halides and switch out to HPS when they flower. You might consider a combo bulb but don't get the cheep ones, for the won't last very long. I prefer to switch bulbs, which requires a dual mode balast.

Putting flowering plants in an Aquaponics system is an invitation to having low nitrate levels and filling your grow beds with roots. You will want your nitrate count at 80 ppm or higher for flowering plants, and only one or two per grow bed of your size. Of course, this all depends on the amount (poundage) of fish per square foot of grow bed.

For the size of grow bed you have (32 sq ft) you will need about 1600 watts of lighting 8 to 12 hours per day.

If you go with too little light then you will have some leggy plants reaching for more light.

Oliver