On December 18, 2018, Summer Energy Holdings, Inc. signed a Single Payment Note with Comerica Bank in the amount of $2,900,000. The Note has a maturity date of June 11, 2020, with interest thereon at a per annum rate equal to the Prime Referenced Rate" plus the Applicable Margin." The Prime Referenced Rate" means, for any day, a per annum interest rate which is equal to the Prime Rate" in effect on such day, but in no event and at no time shall the Prime Reference Rate" be less than the sum of the Daily Adjusting LIBOR Rate for such day plus 2.5% per annum.