9w bulb

This is a good bulb. With the 9 watt however, you can see the individual RGB diodes at the top of the bulb, and the prism of color they create. Not really a problem if you use it in a lamp and don't actually see the bulb, but it is a little distracting if you use it in a visible application. None the less, it is much brighter than the 5 Watt (awesome bulb) but does show the prism.