It depends on the LED corn bulb IP grade you get.

For indoor application, if the working environment is very clean such as your residential house or commercial warehouse, IP20 is enough. However, if the place is very dusty such as indoor horse arena or barn, a more dust tight level IP40 should be used.

For outdoor application, as the corn should not be exposed to water in damp location, otherwise its internal driver would be burnt, so we need to use IP65 waterproof rated LED corn cob bulb, usually there is a cover outside over the LEDs. Therefore, high IP grade corn is more expensive than lower grade corn LEDs.

Therefore, our suggestion is to use high IP grade corns for outdoor and half outdoor(under canopy) lighting where the water (rain drops) possible enter into the corn, while using low IP grade LED corn lamp for indoor low bay or high bay lighting in order to save cost.

Colshine led corn lights IP65

The LED corn light bulbs application widely: