It's a little bit tricky to change out this bulb, but you don't need any tools. Just three screws that you can twist out with your fingers. Our original bulb lasted about a year and half. This one is a good replacement so far. Working well.

I am SO THRILLED with this DynaTrap DT1050-TUNSR Mosquito & Flying Insect Trap. It REALLY WORKS! And this is coming from the most mosquito attractive person I know… ME! We have literally tried just about everything: Citronella (doesn’t work & not great when you can smell it while you’re trying to eat outside) Zappers (only works slightly better, but that embarrassing noise it makes… nah) Mosquito repellant sprays (don’t want the smell or spray residual near where we’re eating food) Although we live in southern California and never had problems with mosquitos before, it’s become a HUGE PROBLEM over the past few years. It can ruin any time you want to spend on the patio, unless you use lots of spray or other repellants. And not only are the bites annoying (I am also slightly allergic), but they can be dangerous (lots of new mosquitos in our area that are much more aggressive and can carry disease). After a lot of research, I found this fan and trap style of mosquito device and after reading loads of reviews, decided to give it a try. I was desperate! With a fast-approaching patio dinner for friends, I needed something that would really work so I ordered the trap and set it up near our patio table, two days before the dinner. After twenty-four hours of continuous use, the trap had a fair number of mosquitos, moths, and gnats in it. I continued to let it run (next to the table), and moved it about 25 feet away, a few hours before our guests arrived. During the dinner, I kept checking my arms and ankles to see if I had been bit. NOPE! Not one bite and I never saw a mosquito. As a matter of fact, the fan on the device is fairly quiet, so while we sat around talking and eating, it never bothered us in the least. This trap is WONDERFUL, and I would HIGHLY RECOMMEND using this when you don’t want to use a toxic spray and you haven’t had any luck with smelly citronella candles! I’m even thinking about purchasing a second one for our front courtyard!