I'm liking #68... I'd say in my top 3.. if you have time to submit a color variation it might help... maybe blues and black or whatever you thought.. I"m not really sure.. I like the warmth of what you have now... but I think it might feel too playful. Blue and black might be too cold... so looking for something in between perhaps.
I'm liking the symbol.. It's just too scientific looking..... I'm wondering if it can be freeformed.. a little more sketchy looking, slightly more abstract.. I don't begin to know how to do that.. but I like the subtle reference to the light bulb in yours... but it's too serious looking, scientfic.. and that goes against the creative vibe it needs to have.
The type treatment I think is perfect. I'm just not sure how to loosen up this design so it's more fun..