We had to replace our bulbs and got the knock-off because they were MUCH cheaper! But the metal ends are not secured properly, and they would not turn on the machine. My husband fiddled with this for a couple of days, just about ready to get a new machine. I said it might be the bulbs. Ordered the official bulbs and within 3-5 minutes it was working. Shame they are so expensive, but they work!

I had one of these given to me by a member of my family because they thought it had stopped working. The bulbs were burned out that's all that was wrong with it, replace these bulbs and it works great. The bulbs really do work to attract insects

The bulb blew after the first few minutes of me switching it on for the first time. I tried to get it replaced, however dynatrapoutlet.com advised I needed to return it and reorder one, I did not want to do this as the price has increased considerably, dynatrapoutlet.com refused to send me a replacement for the same price I had originally paid.. I contacted Dynatrap and they said the seller should replace it, not them, so they refused to take responsibility for it as well, even though there is a 1 year warranty. I ordered a new bulb (and paid for it!) and it arrived today, the bulb works but keeps switching off after the first 5 seconds so the unit is obviously faulty. I have no choice but to return it and I won’t be buying another. Very disappointing!

Unit arrived by USPS in undamaged carton and appeared pristine, but would not switch on. I bypassed dynatrapoutlet.com to call the manual's manufacturer contact, who immediately sent a replacement by UPS. The second unit runs, so I'll be able to assess effectiveness soon. The new carton had a pack of mounting screws, a cleaning brush, and a laminated insert of "important information" that the first lacked, so I think the first unit had been a return. Such should get basic quality checks for function and accessories before re-issue. They did not want it back this time. So great customer service, even if initial fulfillment in combination dynatrapoutlet.com failed. High hopes on effectiveness!