Side-by-side
Airfield Lighting Control Panel (FAA L-821) vs PAPI / APAPI Precision Approach Path Indicator (ATG Airports, distributed by Vardhman Airport Solutions)
Spec comparison for two products on Aviation Souk. Both compete in Runway Lighting & Airfield Electrical.
Runway Lighting & Airfield Electrical
Airfield Lighting Control Panel (FAA L-821)
by Flight Light Inc.
Compact FAA L-821 airfield lighting control panel integrating relays, switches, and human interface in a single UL-listed cabinet, available as a conventional Type I or PLC touch-screen Type III system.
Runway Lighting & Airfield Electrical
PAPI / APAPI Precision Approach Path Indicator (ATG Airports, distributed by Vardhman Airport Solutions)
by Vardhman Airport Solutions
Four-unit visual glideslope indicator giving pilots a precise colour-coded approach path signal from final approach to threshold, manufactured by ATG Airports and distributed across South Asia by Vardhman Airport Solutions.
| Cost of ownership | Airfield Lighting Control Panel (FAA L-821) | PAPI / APAPI Precision Approach Path Indicator (ATG Airports, distributed by Vardhman Airport Solutions) |
|---|---|---|
| Price tier | — | — |
| Lead time (weeks) | ?–? | ?–? |
| Delivery | — | — |
| Install | — | — |
| GCC airports deployed | 0 | 0 |
| Certifications | 0 | 0 |
Specs
Technical specifications.
| Spec | Airfield Lighting Control Panel (FAA L-821) | PAPI / APAPI Precision Approach Path Indicator (ATG Airports, distributed by Vardhman Airport Solutions) |
|---|---|---|
| FAA Certification | L-821 per AC 150/5345-3F | — |
| Available Types | Type I (conventional switches), Type III (PLC touch-screen) | — |
| Manufacturer Certification | ISO 9001:2015, UL Listed | — |
| Installation Method | Cage-clamp terminal blocks, commission-free | — |
| Interface (Type I) | Rotary, toggle, or push-button switches | — |
| Interface (Type III) | State-of-the-art PLC with touch-screen display | — |
| Origin | Made in USA (Buy American Act compliant) | — |
| Configuration | — | 4-unit (PAPI) or 2-unit (APAPI) |
| Unit spacing | — | 9 m |
| Runway edge offset (nearest unit) | — | 15 m |
| Nominal glideslope | — | 3 ° |
| Colour transition band | — | ≤3 minutes of arc |
| Beam width | — | 30° ICAO wide beam |
| Acquisition range (daytime, met vis 7.4 km) | — | 19 km |
| Series circuit compatibility | — | 6.6 A, 8.33 A, 12 A, 16 A, 20 A |
| Voltage transformer options | — | 240 V / 120 V, 50/60 Hz |
| Compliance | — | FAA AC 150/5345-28, FAA 880/881, ICAO Annex 14 |
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