The Island of Kauai has the Nation's highest electricity rates and because of that all 5 towers of the Kauai Marriott Resort (Kauai Lagoons) had our Vista-28 CDF and 4Mil to reduce 68% heat, 70% glare and 99.9% UV Rays-- the 4Mil version of this film also brings the old pre-code glass up to Kauai County's Safety Glazing Code, saving all of the old glazing as well as saving hundreds of thousands of dollars in energy.