The tank you got your inspiration from is mine and I decided to switch out from the standard cfl bulb and went with a clamp on led light one of the ones off of ebay it is only 3watts I believe which I thought I would test out and if the plants died I would find another option. However I only had to remove one plant which was my didiplis diandra. I now have myrio green, anubias nana petite, fissidens fontanus, rotala rotundafolia, and anubias nana and they are all growing great. Especially the myrio green I went on vacation for a week and when I returned it was nearly growing out the top of my vase. It was so crowded in there I could not believe it.
The bonus of having the light is it looks great so good in fact I was able to move the tank to my family room and use it as a table lamp of sorts. I will post some new pictures later. Apparently aquatop will soon be releasing a 60 led version which sports 6 watts of led lighting. When they do that I will probably pick that up. You should look into them they work great on these vases. They also have the option of running either blue, red, green, white, or any combination of those led's at the same time.