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nomorecatering
13th Nov 2006, 12:25
Just browsing a couple of airfield lighting web sites and noticed they are marketing LED taxiway centreline and edge lights. But could't find anything on LED runway edge lights. Now i;m talking about permanent lights, not portable battery powered ones.

Have LED runway edge lights been made available yet. If not how long till they are developed enough.

Zeffy
13th Nov 2006, 12:54
Won't LED lighting be problematic to EFVS which are "tuned" to incandescent lamp spectra? For example,

http://www.kollsman.com/products/commercial-aviation-systems/enhanced-vision-system.asp

http://www.cmcelectronics.ca/En/Prodserv/Commav/commav_evs_overview_en.html

chevvron
14th Nov 2006, 07:17
Are LEDs suitable for varying intensity; you'd need at least two intensities for runway edge, more if the runway is precision instrument.

Piltdown Man
15th Nov 2006, 13:37
You could manage that. Have each light as an array of bulbs. One bulb = dim, twenty = bright. But from the looks of things, LED's are already here in the UK. I'd swear that the "wigs-wags" at LCY are LED's.

Spitoon
15th Nov 2006, 17:12
I wonder whether the problem is getting the necessary brilliance (i.e. candelas) out of LEDs.

forget
15th Nov 2006, 17:27
Lots of LED info here......

https://www.industry.siemens.com/adb/en/productcenter/product_catalogue/taxiway_apron_signs/a03450/a03450_01.htm