Smart light bulbs are controlled by some device, and have a huge number of differences. For example if the device is your phone, then you can automatically activate the smart lights when you get near your home, by the transmission of your GPS location.

Smart light bubs are controlled by a device like your iPhone, iPad, google home or Alexa. However they are much more expensive than normal light bulbs.

A main difference of smart light bulbs is that can be dimmed without a wall dimmer.

Another main difference is that smart light bulbs can be scheduled to turn on and off without a person doing it.

This can be a great security function.

Also, all the light bulbs in your house can be controlled from a single device.

Smart light bulbs not only can be dimmed without a dimmer, but the high grade ones can also change their colour. The device controlling him will have a colour wheel and you just need to set it.