These are standard size non-dimmable bulbs that will work with most fixtures. I sell smaller bulbs for medicine cabinets also. These 11W LED bulbs can be covered by an EzLightWrap without touching and provide fantastic bright light. 

I recommend you do not use 75W equivalent bulbs if more than 4 bulbs are in your fixture. For those longer fixtures use 60W as that will provide plenty of light. I like these Greenlite 11W LED bulbs for their bright clean light - not a blue or yellow cast.