Linear Fluorescents
<--T-12 2 Pin 1.5 inch diameter
<--T-12 4 Pin 1.5 inch diameter
<--T-12 High Output 1.5 inch diameter
<--T-8 2 Pin 1 inch diameter
<--T-8 4 Pin 1 inch diameter
<--T-6 2 Pin for display cases 3/4 inch diameter
<--T-5  4 Pin 5/8 inch diamter
<--T-4 4 Pin 1/2 inch diameter (don't buy these cause nothing is standardized, good luck finding them if you already have)