What are the effects of live wallpapers on battery consumption and speed?

> 7" tablet, Azpen A727 , running Android 4.2.2 What is the effect of using live wallpapers on Android tablets? I'm using a 7" tablet, running Jelly Bean 4.2.2 with a 1.5 GHz processor, 4GB flash memory, and I recently set my wallpaper to "Nexus " -- I want to know if this will have a negative effect on the (1) speed (2) battery life of my tablet.