Hi Amys,
I love your designs but looking for a light bulb with a bit more creativity.
I was thinking of turning the top half of the brain, or using more a abstract light bulb. See some ideas on the links below...
http://naldzgraphics.net/inspirations/light-bulb-logo/ <
http://naldzgraphics.net/inspirations/light-bulb-logo/> Cheers
KC