C9 Christmas Bulbs are the largest of the C Style Retro lights. These lights really pack a punch as their 1 inch diameter makes it easy to see them from longer distances. If you don’t need that much power they also come in various shades with transparent and opaque style bulbs available. Our C9 Christmas Lights can be used indoors and outdoors while many of them are a heavy duty commercial grade. It doesn’t matter if you need Retro Glass, Ceramic or LED options we have them all at Christmas Central.