ED28 bulb shape
mogul base
Clear outer glass
Universal lamp operating position
ANSI code on the lamp must match the code on the ballast
Premium Life MH250/U/ED28
ITEM#: 70321
MH250/U/ED28
ANSI code: E=Enclosed Fixture Required
Quantity: 3
I purchased the wrong bulbs. I meant for them to be for indoor nursery growing conditions. These would be great for a warehouse lighting situation.