Enchantment effect reduced after enchanting ?

Lymark

So I was enchanting a ''Adds 52 Max Magicka'' Glyph into my waist. However, it has only added 22 Max magicka after enchanting.
Is that normal and how does it work?? I'm assume there is a way I could increase the maximum enchanting effect that I don't know of?

Shimond

Think it's also affected by the level and quality of the item.

Trouvo

there is a trait for that, and also side equipment like belt, helm and boots get half the enchantment