That's a matter of opinion we suppose, and depends on one's own personal definition of "waste". The amount of power is really fairly minimal, compared to things like running air conditioning in the summertime, or doing laundry with your electric washer and dryer. The computer control helps keep the total power consumption down, and nearly all of our lights are energy-efficient LEDs. But all that aside, a lot of folks love looking at Christmas lights. It helps people of all ages get into the holiday spirit, and makes memories for people that might last a lifetime. Is that a "waste"?
Did this answer your question?