Product Comparison: Flowtron BK-40D vs Black Flag BZ-40

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General Specifications
Black Flag
About the Product
Rid your outdoor living areas of flying insect pests - without harming the environment! Insect remains, uncontaminated by pesticides, fall to the ground to be naturally reabsorbed into the ecosystem. Maintenance free operation features UV light and an electrified grid that eliminates thousands of flying pests for just pennies a day.
The Black Flag BZ-40DX is a 40 watt deluxe bug zapper. It covers over an acre, attracting and killing bugs within a 3/4-acre radius. With 5500 V of power, this bug zapper generates complete insect control. The BZ-40DX bug zappers advanced circuit board technology and Octenol lure have made Black Flag bug zappers the #1 most consumer-recognized bug zapper brand. Keep your summer evenings pest-free with this premium bug zapper.
Key Specs
Coverage Area
Outdoor: 1 acre
Outdoor: 1 acre
40 watts
40 watts
Bulb Type
One 40 watt high intensity ultraviolet, (black light), bulb BF-190
Replacement UV bulb
Mosquitoes, Flies, Moths
Flies, Mosquitoes, Moths
What customers say about "Key Specs"
Flowtron BK-40D Electronic Insect Killer
  • Not wanting to lather ourselves in bug spray before bed, we opted for the BK-40D zapper. Boy, are we glad we did!
  • As good as the BK-40D has been in keeping mosquitoes away from my yard, and as helpful as Flowtron's tech support has been, I cannot give this product more than three stars.
  • We put this Flowtron BK-40D bug zapper about 25 feet from our deck and have found it to be very effective.
  • As for the BK-40D, this bad boy is awesome! Before, I never liked being outside for too long due to being pestered by bugs.
  • Regarding the BK-40D. Not really sure it killed very many mosquitoes but it really did a number on moths and the like.
Black Flag BZ-40 Outdoor Bug Zapper
  • Overall, we really like the Black Flag Outdoor Bug Zapper. It is not noisy when it kills the bugs and the black light seems to attract as many bugs as the white light did.
  • We couldn't enjoy our patio. we have it set on a timer so when we are ready to enjoy our evening outdoors it virtually bug free. Thank you for an awesome product!
  • Which I don't mind because being outdoors in the yard was not possible before we had the lights. I use the WHITE light the BLACK light one did not work very well for us.
  • The replacement does kill but it is not very powerful. I do not hear the immensely satisfying ZAP. If you want something quiet this it.
  • The unit does not seem to have enough power, some bugs get killed but many just pass through the grid and fly away.
Size & Weight
16.5 in.
19 in.
9.75 in.
9.63 in.
9.75 in.
9.63 in.
5 lb.
5.2 lb.
Weatherproof polycarbonate
Electrified Grid
AC Powered Grid: 5500V
AC Powered Grid: 5500V
Collection Tray
Power Cord
1 ft.
1.5 ft.
Patented, high efficiency, non-clogging killing grid, Transformer powered Vertical Rod killing grid system, USDA tested Octenol attractant, a proven mosquito lure - FREE 30 day cartridge
Uses 30% less energy than most other bug zappers and provides 20% more bulb life with superior brightness, Includes mosquito Octenol lure with 30-day continuous release
What customers say about "Features"
Flowtron BK-40D Electronic Insect Killer
  • Easy set up, low hum not not noticeable when place 20 feet away.
  • It runs fairly silently, and the bulb is super bright (so I'm sure I'm attracting all those nasty skeeters from my neighbors yard (they left their pool up over the winter/spring, and it has become a breeding ground).
  • I added an outdoor photocell to the extension cord and once the sun started to drop it’s been dealing out death all night! So far so good...
  • We hang this in our yard, at the end of a 50 foot extension cord -it only has a 6 inch cord, you will need an extension cord!- on a shepherd's hook.
  • Cord is really short, if you don't have an outlet in your eave, order an outdoor extension cord.
Black Flag BZ-40 Outdoor Bug Zapper
  • Sturdy and attractive, this "bug zapper" kills many bugs twice it's size. Well, that's an exaggeration, but I have been impressed with the size of critters that have met their maker on the electrified grids of this beast.
  • However after a few months, and I use the night feature so it is not always on, the light went out.
  • Using compressed air or a compressor makes it easier for cleaning. Had it for three weeks and works outstanding!
  • Tried to stabilize the grid from the outside by using plastic cable ties. Later that day I saw it was shorting near the top inside and starting to smoke. So, I unplugged it.
  • Only problem I see is cleaning dead bugs from the wire grid is somewhat time comsuming. Don't know how other units would be in this regard.
Warranty / Certifications
Manufacturer warranty
2 year(s)
5 year(s)
Other Information
60.95 $

Price History

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