You could solve two issues with some simple live floating plants. The benefit of live plants to the water quality and thus fish health cannot be overstated. For a 10g, the easiest would be Brazilian Pennywort; it is a stem plant but it grows very nice floating. As Izzy said, fish are always more relaxed, less stressed, and thus more colourful with a "roof" over them.
For the light, whatever you decide about the above, I suggest two Compact Fluorescent (CFL) bulbs. If you go with the live plant, two 10w will work; without the plant, two 5w (if you can find them). For good fish colour, "daylight" bulbs with a rating of 6500K (K for kelvin, the measurement for the colour of the light produced). I use the GE Daylight 6500K CFLs, you can get them at hardware and similar type stores.
And welcome to Tropical Fish Keeping forum.