I hate it when that happens....and it has happened to darn near everyone I'm sure. As you mentioned, there are plenty of beautiful corals that look similar. You'll need to get some stronger lighting. Be aware that if you buy a second hand fixture you'll probably want to change the bulbs right off of the bat (assuming that you'll be getting power compact lighting).
Good luck Lady!
If you can't run with the big dogs - stay on the porch! ***Adopt a retired greyhound ***