The LC 500h hybrid coupe will deliver 35 MPG on the highway according to the Lexus USA website :

Lexus USA Fuel Economy LC Hybrid Coupe

The 8GR-FXS 3.5L engine is paired with the new Multi-Stage Hybrid system , delivering a 16 horsepower boost and an additional 1 MPG improvement over the previous generation hybrid system used in the GS 450h.