We get asked the question a lot, what kind of bulb is best? Strangely, it is never followed with, why? Knowing what makes a grow lamp a good light to use is a beneficial criteria to know.
Lumens - The amount of light emitted from the bulb
Par - The distribution of the light across a plan
Spectrum - The colors of the light reaching your pants. MORE ON THIS HERE.
Mean Lumens - The average amount of light that the bulb will emit during its peak life
Peak Lumens - The highest amount of lumens the bulb gives off
Average Life - The amount of hours the lamp will typically burn for
Color shifts - Any bulbs denoting shift typically means that bulb is slightly varied from the standard colors. Ex. An HPS can be shifted for even more red or added blues for wider spectral lengths.
Frequency - The
Wattage - The amount of energy used to power the light.
Bulb type - There are several different types of grow lamps these days.. Dual Arcs, conversion bulbs, HPS, MH, Mercury Vapor, Halogen, Incandescent… and many have different base types and sizes. Not all are interchangeable.
Base Type - Can be E-39, E-52 and several other types. If you are unsure, check the box, and sometimes the bulb will have it printed on it.
Position - can be universal, horizontal or vertical. Unversal can be denoted as vertizontal, a clever play on the words I think.