I had been looking for lights for around the backyard patio. The bite fighter string lights are just what I was searching for! The bonus of mosquito repellant was such a plus. Living in the south, we deal with mosquitos nearly year-round. The bulbs were very easy to install. Just screw them in. My 13 year old helped me with these. The mosquito repellant is a little messy to install but washes off the skin easily. The cord is very heavy duty and I like that you can turn the mosquito spay off with a flick of the on-off switch. I haven’t had to change the refills yet but like the fact that they will work without it. These lights have brought some a warm ambiance to my patio. I really love them!