Lighting design - anyone know the price range?

My photographers suggested that I look into hiring a lighting designer for our wedding so my photographs won't be so dark (long story) My wedding is during the day, but it is in a dark room, so I am kicking around the idea of adding some light.

Have any of you priced any lighting companies?

I just got a very reasonable price quote from http://www.luminousld.com/

I called a few ones in the city and they STARTED at $5000 but Luminous starts at $1000.

Thank you!