Aluminum
Out of all the materials used for the housing of an LED garage light, aluminum is likely the all-around best though it should also be noted that aluminum is generally a bit more expensive than plastics as well. However, if you are willing to pay a little bit more up front, an aluminum body for your LED garage light is a far superior option than any type of plastic. For one, aluminum may be a bit heavier than the commonly used plastics, but it is still actually an incredibly lightweight material. On top of that, aluminum does not suffer from the same susceptibility to strong solvents that the plastic materials do.
Finally, aluminum is a waterproof material, despite being a metal, so you do not have to worry about rust or corrosion. The only potential issue with aluminum as a material for an LED garage light’s housing is that it could potentially conduct electricity should the LED garage light’s connections improperly ground.