Thanks for your questions! First of all, our newest version of the G9 bulb is a brighter bulb, at 600 lumens, and can be purchased here. It only uses 6W, so it is well below the 40W maximum for the fixture. There are halogen G9 bulbs on the market (as opposed to LED) so if you were to purchase a halogen bulb, it would need to be max 40W. Hope that helps!