Well, you can spend $3.50 on flexwatt and use 3 or 4 watts of electricity or you can spend a minimum of $60 with shipping and operate at 40 to 60 watts to heat the same enclosure with a panel. You can buy a Kia or a BMW to drive to work in. They will both get you there. One costs $11,000 the other costs $55,000. Same principle.