Precise Flight is Dedicated to Enhancing the Margin of Safety and Significantly Increasing Profitability of Commercial Aviation Customers.

After 10 years of testing aboard the fleets of Alaska Airlines, Horizon Airlines, Qantas Airways and several other regional airlines around the world, there is empirical data that quantifies the Pulselite® System's effectiveness at substantially reducing bird strikes and significantly increasing the visibility of your aircraft.

Airlines that have modified their fleets with the Pulselite® System have reduced bird strikes by 30% to 66%, resulting in significantly increased profitability, enhanced safety, improved customer service and higher customer satisfaction ratings.

There are more than 60,000 bird strikes annually that cost the airline industry over $3 billion globally and over $1 billion in the United States. Nearly 90% of bird strike costs are caused by service disruption from delays and cancellations, while damage repairs only account for about 10%.  With an average reduction in bird strikes of 40%, the Pulselite® system will save your airline approximately $60,000 annually per aircraft, which will significantly increase profitability, while enhancing safety, improving customer service and increasing customer satisfaction ratings.

Please call Precise Flight today at 1-(800) 547-2558 to schedule a custom financial and operational analysis of how the Pulselite® System can improve your airline's financial and operational performance.

How the Pulselite® System Works

The Pulselite® System is an FAA certified, light weight, electrical system modification that alternately pulses the existing lights of your aircraft at a specific frequency and pattern that significantly increases the conspicuity of your aircraft, and reflects its speed and directional movement. 

A growing body of research confirms that non-pulsing, steady-state lights create the false and hazardous impression of a stationery object. Precise Flight's Pulselite® System is the only FAA certified on-board solution that pulses the existing lights of your aircraft, thereby removing the hazard of steady-state lights. The result for your aircraft is significantly increased visibility, and a significant reduction in costly and hazardous bird strikes.




Additional Benefits beyond Bird Strike Reduction


Enhanced Safety

Beyond its significant financial and operational benefits for airlines, the Pulselite® System also provides enhanced safety.  In the air every day and night, in all weather conditions, visibility is important to flight crew and passenger safety. Airlines that pulse their lights exhibit a lower occurrence of near miss events. The Pulselite® System uses patented technology to integrate into the aircraft's TCAS (Traffic Collision Avoidance System).  When TCAS issues a warning to the pilot, the Pulselite® System engages and pulses the aircrafts lights, in the event that the lights were not already pulsing in that phase of flight.  The result is increased recognition and visibility to other aircraft in the area.

Pulselite Increases Lamp Life

Increase lamp-life up to 3 times

Another benefit of the Pulselite® System is that it increases lamp life by up to 3 times by allowing the filament and bulb to run at a lower temperature. The bulb retains full rated candle power; less heat, less stress, and more visibility. It's a win-win!  If you're turning on your landing lights for visibility, you might as well get the best visual benefit and save on the cost of bulb replacements and maintenance.

Bird Strike Attack

Reduce the Likelihood of Bird Strikes

Is there a means by which birds might better discern aircraft position and speed, so as to reduce bird strikes? We know that vision is a primary and highly developed sensory pathway in birds. Recent work has shown that light can be an effective tool as a bird repellent and, potentially, as an alert, especially when bird strikes cost the international airline industry over $3 billion annually.

Pulselite® Improves Recognition


FAA Aircraft Mounted Light Evaluation

  • February 2004 “...The Pulselites offered increased conspicuity estimated to be 1/2 to 3/4 mile over an aircraft holding in position with the landing lights on steady. Once observed, the motion of the reflected Pulselite off of the runway surface in front of the holding aircraft was pronounced”

National Highway Traffic Safety Administration

  • Development and testing of techniques for increasing the conspicuity of motorcycles and motorcycle drivers (October 1979) by P. L. Olson, R. Halstead-Nussloch, M. Sivak

Sunstate/Qantaslink Trial Finding

  • 78% of Air Traffic Controllers agreed that the Pulselite® enhanced aircraft visibility.

Control Tower Comments

  • Rockhampton Tower "Aircraft are easier to see."
  • Hamilton Tower “Definitely easier to see particularly in hazy conditions.”
  • Cairns Tower “Definitely easier to see from the Tower.”
  • Mackay Tower “We have found the aircraft a little easier to see at longer distances. RT chatter also supports this.”

Department of Transportation

  • Alerting Lights on Locomotives - In a similar transportation analogy, the DOT required Railway Locomotives to be outfitted with pulsing ditch lights (like aircraft recognition lights) in 1995. The resulting documented improvements in railway grade crossing accidents has been outstanding.
    • CalTrain – Accident reduction 76.4%
    • Conrail – Accident reduction 74.3%
    • Norfolk Southern – Accident reduction 54.6%

Improved Conspicuity of Aircraft

Approximately 74% of the airline’s pilots who responded to the pilot survey believe that the Pulselite® system enhances their aircraft’s visibility.

Prepared for Sunstate Airlines/QantasLink by Peter Reardon Enterprises Pty Limited.



The Hazard: Bird Strikes to Civil Aircraft


Bird Hazards to Aircraft

  • Departure vs. Arrival

    • Approach:

      7.9 Nautical Miles

    • Departure:

      1.5 Nautical Miles

    Approaching planes spend the most time in bird zones (Below 3000 ft.)

    Most bird strikes happen outside the range of airport countermeasures.

  • Wildlife Strikes

    • Takeoff Run

      9,931 Bird strikes

    • Climb

      9,000 Bird strikes

    • Descent

      1,816 Bird strikes

    • Approach

      18,883 Bird strikes

    • Landing Roll

      8,532 Bird strikes

    The largest number of strikes occur in the approach phase of flight.

    Wildlife strikes to civil aircraft in the United States 1990-2005

  • Flying in the Bird Zone

    • 500 ft.

      28,806 Bird Strikes 1,023 (3.6%) causing substantial damage

    • 3,500 ft.

      7,469 Bird Strikes 445 (6%) causing substantial damage

    • 3,500+ ft.

      2,686 Bird Strikes 85 (3.2%) causing substantial damage

    Only 5% of reported strikes with civil aircraft causing substantial damage above 3,500 ft. AGL. Dolbeer's Rule: Above 500 ft. AGL, bird strikes decline by 32% every 1000 ft.

    Cleary, E.C., R.A. Dolbeer, and S.E. Wright, 2003. Wildlife strikes to civil aircraft in the United States, 1990-2002.



Bird Strikes to Civil Aircraft - Night vs. Day


Wildlife strikes to civil aircraft in the United States, 1990-2002


The Research: US Department of Agriculture


Float Plane Pilots Notice Dramatic Decrease in Bird Strikes

In the early 1990’s float plane operators in the Pacific Northwest, British Columbia and Alaska began reporting that along with the improved recognition and increased lamp life, bird strikes were dramatically reduced by pulsing their landing and taxi lights.

Armed with this important information, Precise Flight approached the USDA to initiate avian testing with pulsing lights.



Aircraft Mounted Light Experimental Technique

Biologists at the National Wildlife Research Center Sandusky, OH, field station have developed an experimental procedure to test the use of aircraft-mounted light as a potential technique to reduce bird strikes.

Test groups of birds were exposed to the approach of a vehicle fitted with 2 aircraft landing lights spaced at 12 feet apart on top of the vehicle. The vehicle was driven at a consistent speed of 75miles/hour toward a flight cage immediately next to the road. Flock responses behaviors of brown-headed cowbirds, Canada geese, European starlings, herring gulls, and mourning doves were recorded by a video camera and then quantified.

Birds were exposed to various, no lights, pulsing lights, and steady lights. The biologists were able to show that birds exhibit earlier and more cohesive avoidance reactions to approaching vehicles in response to light and other external stimuli.

Responses to the vehicle differed markedly among species. Further, because of the effects of varying ambient light conditions on bird response to the approaching vehicle, the biologists suspect that contrast to background lighting is likely important to increasing avian awareness of approaching aircraft. The results indicate that bird strikes may be reduced in the future by enhancing the visibility of aircraft. Additional research has been planned involving varying pulse frequencies and specific light wavelengths.

The studies found that 91 to 99 percent of birds “exhibited alert behavior” when exposed to incandescent pulsing lights.

The tests also showed that the pulsing lights were most effective in low-light conditions, such as cloudy days, nighttime, dusk and dawn.


The Solution: Precise Flight Pulselite®


Sunstate/Qantaslink Pulselite® Trials 2002-2003

The use of the Pulselites® on the DHC8-300 fleet indicates that activation of pulsing lights in accordance with company standard operating procedures resulted in a reduction of wildlife strikes by approximately 50%.

The fleet was averaging approximately 3.65 strikes/aircraft/year prior to the evaluation and approximately 1.83 strikes/aircraft/year with Pulselites®. The results were so impressive the airline purchased the Pulselite® system for the entire DHC-8 fleet. (Prepared for Sunstate Airlines/QantasLink by Peter Reardon Enterprises Pty Limited).



Qantas 737 Pulselite® Trials 2005-2007

Qantas Success Stories

An averaged B737 bird strike reduction rate between approximately -10% and -35% with a pulsed or modulated light system operational has the ongoing potential to save a 100 aircraft Airlines approximately $2.5 to $8.9 million per year respectively. (Pulselite® system B737 Operational Evaluation by Qantas Airlines)

Their business case was based on the early results and funded the purchase for the remainder of the B737 fleets BEFORE the evaluation period was completed (confident and satisfied with the product and wildlife reduction rates).

  • 5 B737-400 aircraft

  • 5 B737-800 aircraft

B737-800 Group Results

Achieved a 66% (day and night) bird strike reduction rate per 1,000 departures, compared to a non-Pulselite® equipped B737-800 group.

Daylight only bird strike reduction rate was 49%.

B737-400 Group Results

Achieved a 54% (day and night) bird strike reduction rate per 1,000 departures, compared to a non-Pulselite® equipped B737-400 group.

Daylight only bird strike reduction rate was 30%.



Alaska Airlines and Horizon Air 2008-2010

Alaska Air Group is committed to the Pulselite system to decrease the incidence of bird strikes and to increase air-to-air conspicuity for other aircraft and ATC.

Alaska Airlines

Alaska commenced a fleet-wide fitment of Pulselite on their Boeing 737 series aircraft in 2010. The system was endorsed by their safety, maintenance & engineering groups, and the senior pilot corps. The cost analysis they performed exceeded their internal criteria warranting fleet-wide implementation. With a business case based on known operating/damage costs and a conservative 25 - 30% bird strike reduction proved by Qantas, Horizon, and USDA research, they successfully demonstrated to management the justification (a less than a 2 year ROI) for installing the system.

Horizon Air

Horizon initiated a fleet-wide fitment program on their Bombardier Q400 aircraft in 2008.



Pulselite® Increases Lamp Life


Pulsing the lights extend lamp life by a minimum of 300%.

Smooth transitions between ‘dim’ and ‘bright’ mode reduces operation temperature of lamp filaments and eliminates constant electrical jolts and spikes of ‘on-off’ circuitry.

Incandescent lights are like car engines “For car engines the engine wear is maximum at initial turn on, and wear increases if we run the engine at maximum performance. Your car engine will last longer if you run it at a normal cruise speed. Similarly, an incandescent filament has its highest potential for damage when the light is turned on from cold and is run at maximum filament temperature. Pulsing the light allows the filament to run at approximately 70% of normal filament output and only allows the filament to cool to a 15% output state before rising again. Reduced average voltage on the lamp is key to long lamp life just as reduced speeds on your car are key to its longevity.” -Scott Philiben, Aircraft Modification Engineer.

Sunstate/Qantaslink Trial Findings

The average lamp life for the Pulselite equipped aircraft was approximately 1860 hours compared to approximately 630 hours for the non-Pulselite aircraft, i.e. the Pulselite system extended the lamp life by a factor of three (3).

Applying trend analysis to the factual data collected indicates that the Pulselite equipped DHC8-300 fleet may experience extended lamp life in the range of approximately 800 hours to 3,000 hours, or more while the non-Pulselite fleet may expect to continue an average of approximately 600 hours for their lamp life. (Prepared for Sunstate Airlines/QantasLink by Peter Reardon Enterprises Pty Limited).