Another tip - try using GU10 spotlights. IKEA sell floor/desk lamps with the GU10, 36 degree spotlight bulb, about 6-7W LED. They look great. Photo attached - hard to show as it is due to saturation. Have them fitted on a plant grow tank, not a display tank, but they look very good and are very cost effective for plants. Different spectrums available and bulbs (not just IKEA bulbs, any GU10 bykb will fit).