Whelen Parmetheus Plus LED Replacement 28V Landing Light - PAR 36 - P36P2L

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Part# 11-12978
MFR Model# 01-0771833-20


FAA-PMA Approved
Parmetheus PAR36 LED lights are a drop-in replacement for outdated Halogen lamps. PMA Approved, lightweight, low-current and moisture resistant, they provide stable light output for thousands of operating hours. These LED lights are 40% brighter output than the original Parmetheus Series assemblies.

LED lighting is the ideal technology for aviation applications. Whelen LED lights are time and field-tested for reliability and long-life performance under the tough conditions required by Fire, Emergency, DOT and Law Enforcement professionals around the world.

California Prop 65 Warning Symbol

WARNING: This product can expose you to chemicals including Methylene Chloride, which is / are known to the State of California to cause cancer and/or birth defects or other reproductive harm. For more information go to


  • Direct replacement for outdated PAR36 Halogen and HID lamps.
  • First commercially available PAR36 LED for Aviation applications.
  • 10,000 hour operating life.
  • Available in Landing and Taxi versions.
  • Convenient “Drop In” design for ease of installation: Power wiring attaches to brass screw terminals; Weight is virtually identical to previous PAR36 lamps; Assembly design includes clocking notch.
  • Polycarbonate, replaceable, hard-coated outer lens.
  • Metal, heat dissipating coated housing.
  • Whelen TIR™ (Total Internal Reflector) technology rivals strobe in intensity and effectiveness.
  • Proudly designed and manufactured in the USA.
  • Five year warranty.


  • Model: P36P2L
  • Type: Landing (Spot Light, 10 degree)
  • Amps: .6
  • Volts: 28 VDC
  • Size: 4.28" Round x 1.75" Face to Screw terminal
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A dramatic improvement over incandescent bulbs, and a simple, one screw installation. There are two points to watch for: 1) The terminals are not marked + or -, so when you connect your light, there is a 50-50 chance you got it backwards. Check to make sure it works before you reinstall it. If it doesnt, just switch the connections. 2) Note that the identical lens comes in both 14V and 24V. If you get the wrong one, it wont work...dont ask me how I know! The exchange policy works well, and is easy to accomplish.

Ken B
March 22, 2021

Great light easy Install

Ben H
May 10, 2020

I ordered this for a customer/friend w a Cirrus. When he got in to change out his “dead” incandescent bulb he discovered a loose wire was the culprit. He asked about returning the bulb. I suggested he install it and if he didn’t like it I’d buy it back. He’s SOLD! Won’t even CONSIDER going back. Awsome, one time installation that makes a HUGE difference in your night flying AND... you can leave it on (low amp, 15,000+ life and visible in the day) for safety.

April 19, 2020

I installed one of these in the nose of our A36 two years ago and love it! I leave it turned on any time the Avionics Master is on for increased safety. Low current draw and the same night illumination as the OEM indadescent bulb. Watch for correct polarity and this is easily owner installed.

April 15, 2019

I just purchased 2 of these for my Baron. they seem to work well and draw a fraction of the load that my old lights used. I am looking forward to hopefully never have to change again. In addition, due to their long life I plan to leave them on at all times while flying for increased safety / visibility.

Peter B
September 17, 2018

Arrived quickly and was easy to install. Just remember to match polarity and it will work as advertised.

Bill H
October 30, 2017

I do not have to replace my lights as often, which saves me money.

Tommy E
June 27, 2017

Whelen LED Parmetheus Plus landing light arrived fast and in good condition. After checking polarity and marking the negative lead on my aircraft installation was straight forward. Operation checked satisfactory and its brighter than the standard Whelen LED light I have in my taxi light position. I am looking forward to not needing to change my landing light for many hours.

March 4, 2017

Installed on a PC-12. These are not as bright as the original 250W incandescent lamps were which is why one-star is deducted. I am hopeful that the longevity will offset this. It is greatly appreciated that Whelen has the STC, AML and Permission to Use letter all on their web site at no additional cost. These lamps need to be installed in accordance with the STC.

March 18, 2018

The light works but is definitely not as bright as the stock landing light. Do not buy.

Dave S
August 9, 2021


Please note, Pilotshop's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Pilotshop assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Do you have any details about the watts, lumens, or candela for the Whelen Parmetheus Plus LED replacement 28V landing light, PAR 36?

Per Whelen: This will have 60,000 clandela which is equivalent to a 250 watt bulb.


Yes, this Par 36 lamp is the correct size.

Q: Will the P36P2L fit into the existing bulb socket/mount for an Aerostar 601P?

As long as the installed light on the 601P is a PAR36 lamp, this will be a plug and play replacement.

Q: Is this Whelen Parmetheus Plus priced and sold as a pair or individually?

These are priced and sold individually.

Q: Will this WHELEN PARMETHEUS PLUS LED REPLACEMENT 28V LANDING LIGHT - PAR 36 - P36P2L work in a Beechcraft baron?

The Beechcraft Baron uses a PAR 36 style light, and since this is a PAR 36 light, this should fit. Please confirm your aircraft voltage to be sure you order the correct version, 14v or 28v.

Q: I want to know if its necessary to change circuit break when installing the Whelen Parmetheus Plus?

Most of the time these are drop in replacements, meaning no circuit breaker change required, however, if in doubt, please discuss with your A&P to ensure your install is correct for your aircraft.


The Cessna 182 uses a PAR 36 size bulb. This bulb is 28v, so please verify your aircraft voltage to ensure you order the correct one.

Q: What is the output in Lumens?

These assemblies are rated in candlepower and this would be 56,000 Candlepower.

Q: My Cessna 170 is 24 volt system will the 28V work on 24V system?

Yes, 28v and 24v are interchangeable. 28v can be used on 24v aircraft.

Q: About the Par-36, Parmetheus Plus LED landing lamps. When comparing the 12 volt, Part # 11-12976 with the Part # 11-12978 what is the difference in the amount of light output measured. also watt equivalence & candle power? Also total amps. drawn by each bulb when in service.

The output on the 12VDC assembly and 28VDC assembly will be the same. The total output will be 56,000 Candlepower. In regards to the AMP draw on the 28VDC system the current draw is 0.6 AMPS and on the 12 VDC assembly it will be 1.2 AMPS.