#76 the smaller size makes it stronger
#78 a little too cute for me but a nice variation on the bright idea theme
#79 #77 LIke the red "i" burning point (poss needs to be touch larger, this may be the limited enlarge on the site). Think its so pure it does not need the grey background with fade.
#80 Would quite like to see a variant with just a red dot above "i" and at the end. Very much get we are using the lightbulb as per innovative brief but its not quite right for professional side we are trying to project