Data value for a powered lever?
How would I /testforblock if a lever is powered and is facing west (see the image).
In Minecraft 1.13, this command no longer requires the use of cryptic numbers
/execute if block X Y Z minecraft:lever[facing=west,powered=true]
The Damage value for a powered lever facing west is 10.
/testforblock X Y Z minecraft:lever 10
The wiki states data values here.