Easy to install, only need to remove six screws to get to the bulbs. I just wish these would last a little longer. The Flowtrons I use in my backyard have been great this year. It use to be I could not go outside even in the daytime without covering myself with insect spray. Now I never use inset spray. I use two 1 1/2 acre Flowtrons and they have really brougt the mosquitoes under control. Wish I had used the Flowtrons  earlier. :-)