Why some bulbs are transparent and some are translucent

The only difference between clear glass bulb, and white glass or frosted glass bulb is, how the shadow is casted from the bulb. The clear glass bulb will give you a sharp shadow as if you’ve reached to any beach, the shadow which person seas of him in the ground. This type of shadow is created by clear glass light bulb

On the other hand, the frosted glass LED bulb won’t give you that type of shadow, rather it softens the shadow in a room like a cloudy day. It gives a sharp contrasting shadow with bright colors.