What is the difference between an MH Regular and Super Bulb and how do I know which one I need to buy?
A Metal Halide Super Bulb has a higher lumen (light) output, and is almost always position oriented. These bulbs have a pin sticking out of the side of the mogul (base) where the bulb screws into the socket. These bulbs require a position oriented socked that is designed to catch the pin so that the bulb is rotated into the correct position, otherwise the bulb will not perform as expected. In addition, these Super MH bulbs must be burned in a horizontal position only. All other bulbs (non-position oriented), including the MH Regular bulb, can be burned in either a horizontal or vertical position (i.e. they are universal) unless otherwise noted in the individual bulb description.