I have 4 Tripp Lite surge protector strips at 4 locations. 3 of them are approx 2000 Joules and the other 3300 Joules. They have been in use for 8 years with numerous power failures, up until 2 years ago. One lightning strike, 3 houses down on small bath house, next to in ground pool, 4 years ago. We have 3 tv's with satellite boxes and 1 of the 3 has the 3300 joules with TV, Satellite receiver and AVR. Then 1 outlet with 2 laptops.