I would hope you can swap the plants for something suitable...I assume they knew what you were using them for?
There has been a little success using LEDs for plants but not much, I would steer clear for now, it can be expensive and go well or cheap and be a disaster.
Are there no mini tubes you can use with it? I know the tank has limited space for lighting so it will be a problem I think. 
I did see someone using LEDs for a Marine setup in your tank, but that's not really the same as for planted freshwater....might be worth posting a new topic on the subject...