You may not need to change lights, so hang on, just need some more info. The standard light - Does it go end to end? What wattage is it? 1 tube or 2 T8 tubes?
Tank is nearly 2ft deep?....hmmmmmm this maybe an issue. That is a lot of depth to reach plants down the bottom.
Are you putting hardscape in the tank, like driftwood? If so you could put plants like anubias, and java fern possibly, depends on your answer to what length and wattage your current lighting is :
Remember the higher the light the more work the tank will be. Not my idea of fun tank honestly.