Let's try this again.

A Genie Lift is a blue lift (i.e., used for getting to places higher than right here) often used in construction and, for example, theatre, for changing lights or anything else much higher than wherever you are at the moment.

Smaller models of the lift are electical powered (which tend to be much more useful for indoors, where gasoline fumes are not so welcome), wheras larger lifts are often powered by a mix of gasoline and propane.

Larger lifts are often known by the term "scissor lifts".