(a) In this section, “energy-efficient product” means a product that has been designated as an Energy Star qualified product under the Energy Star program jointly operated by the United States Environmental Protection Agency and the United States Department of Energy.
(b) This section applies only to the following energy-efficient products:
(1) an air conditioner the sales price of which does not exceed $6,000;
(2) a clothes washer;
(3) a ceiling fan;
(4) a dehumidifier;
(5) a dishwasher;
(6) an incandescent or fluorescent lightbulb;
(7) a programmable thermostat; and
(8) a refrigerator the sales price of which does not exceed $2,000.

(c) The sale of an energy-efficient product to which this section applies is exempted from the taxes imposed by this chapter if the sale takes place during a period beginning at 12:01 a.m. on the Saturday preceding the last Monday in May (Memorial Day) and ending at 11:59 p.m. on the last Monday in May.