Rated 4.9 out of 5★ by 7reviewers.
Rated 5 out of 5★ by HardToBeUnique Buy a Flowtron, not a Stinger. I had a Flowtron for ten years. It worked great. The bulbs lasted three years (on a six hour timer). Finally I had trouble finding replacement bulbs, so I bought a Stinger UV40 (the bulbs were in stock at several stores). Mid way through the second year the Stinger stopped working. I got a new bulb, but it still didn't work.Found my ten year old Flowtron in the garage and tested both Stinger bulbs (both turned on, but sparks would arch like a Dr. Frankenstein machine). The Stinger bulb is also too long (stuck out the bottom of the Flowtron). I went online and found these Flowtron bulbs. I ordered two (one as a spare) and my Flowtron is working like new. I stuck the Stinger in the garage, but will likely throw it out. The online ratings of the Stinger are very poor (many don't last a year). 07/29/2012
Rated 5 out of 5★ by winchesters Works good Bug Zapper now works 04/16/2013
Rated 4 out of 5★ by AJConnor Exact replacement This is the exact replacement for the BK-40D Flowtron Insect Killer.Easy to install and work immediately. 07/20/2014
Rated 5 out of 5★ by nfbeeman correct item delivered quickly! great communication. 06/26/2013
Rated 5 out of 5★ by MMaudie Great replacement bulb I was so glad to be able to find a replacement bulb for my Flowtron Bug Zapper . Only $14.59 versus having to spend $60 for another one. Thanks 07/02/2014
Rated 5 out of 5 replacement bulbs product is great but packaging left a lot to be desired....don't know if one of the bulbs will work or not. Four bulbs were left to roll around at will in a huge box with very little packing material. 01/17/2014