LED Spot and Floods
Thread Starter
LED Spot and Floods
Hi guys,
We are seeking to replace our incandescent skid lighting with LED but so far come up with lights that are either super spot or very wishy washy flood, neither of which seems to be able to do the job of the lights being replaced - i.e. a bright flood that can start to produce peripheral cues from 50ft down.
Because we are NVG, it seems the semi dark adapted eye needs LED lighting that is stonger than anticipated. Obviously we want LED if we can due to lower power supply, reduced heat and longer MTBF.
Anyone been down this road with some recommendations?
We are seeking to replace our incandescent skid lighting with LED but so far come up with lights that are either super spot or very wishy washy flood, neither of which seems to be able to do the job of the lights being replaced - i.e. a bright flood that can start to produce peripheral cues from 50ft down.
Because we are NVG, it seems the semi dark adapted eye needs LED lighting that is stonger than anticipated. Obviously we want LED if we can due to lower power supply, reduced heat and longer MTBF.
Anyone been down this road with some recommendations?
Last edited by RVDT; 7th Aug 2013 at 08:39.
Thread Starter
Thanks guys,
I have had a good look through those brochures, but my problem remains.
I have insufficient expertise to determine if they will do the job I need. I cannot afford $400 to buy one and find out if it is right.
I don't believe that lighting manufacturers are across the issue we have - or at least I don't see products addressing it specifically. I need to try and find a flood system that provides adequate peripheral and look around white light vision when using NVG, so one that begins illuminating the ground approx 50ft and provides excellent illumination inside 30ft at the latest - but we want this to be further out if poss.
The 450W spots we use equate to approx 8,000 lums, but none of these products seem to come close, though the whelan systems don't list the technical outputs.
So, being short on expertise and unable to test and try, I wonder if anyone has gone down this path before? We currently have LED skid lights, but they are just not bright enough, and use incandescent 450W spots which are great.
I have had a good look through those brochures, but my problem remains.
I have insufficient expertise to determine if they will do the job I need. I cannot afford $400 to buy one and find out if it is right.
I don't believe that lighting manufacturers are across the issue we have - or at least I don't see products addressing it specifically. I need to try and find a flood system that provides adequate peripheral and look around white light vision when using NVG, so one that begins illuminating the ground approx 50ft and provides excellent illumination inside 30ft at the latest - but we want this to be further out if poss.
The 450W spots we use equate to approx 8,000 lums, but none of these products seem to come close, though the whelan systems don't list the technical outputs.
So, being short on expertise and unable to test and try, I wonder if anyone has gone down this path before? We currently have LED skid lights, but they are just not bright enough, and use incandescent 450W spots which are great.
Whelen PARMETHEUS™ SERIES
From the pictures they don't look too bad.
I assume you are using GE Aircraft Landing lights? There is a part cross reference on the Product Sheets. 4 x the price of an incandescent.
From the pictures they don't look too bad.
I assume you are using GE Aircraft Landing lights? There is a part cross reference on the Product Sheets. 4 x the price of an incandescent.
Colour temperature can be an issue with LED lighting. It causes problems in some non-aviation uses. Worse if long period on LED and then changing to another spectrum. Hopefully makers will get better at this aspect as time goes on.
In theory Blue leds won't penetrate mist as well as tungsten.
General issue as can be seen in the design of the http://www.whelen.com/pb/Aviation/Pr...eus_Series.pdf is that in general no single LED produces the output of a single tungsten so new reflectors have to be designed that accept multiple bulbs.
These nerds are across led development and give a heads up as to what is technically possible with latest LEDs.
CandlePowerForums
Mickjoebill
General issue as can be seen in the design of the http://www.whelen.com/pb/Aviation/Pr...eus_Series.pdf is that in general no single LED produces the output of a single tungsten so new reflectors have to be designed that accept multiple bulbs.
These nerds are across led development and give a heads up as to what is technically possible with latest LEDs.
CandlePowerForums
Mickjoebill
Working in blue-white, high colour temperature, LED lighting for long periods can make adaption to other lighting regimes difficult. I have experienced this myself, particularly after several hours of LED only. (Non-aviation context.)
There seem to be more up-front options for colour temperature of lighting these days, including LED. However, seeking high outputs will tend to keep colour temperatures high to avoid losing output in a filter.
I would hope that somebody out there has done the science for the effect on pilots when changing lighting regimes or viewing instruments.
There seem to be more up-front options for colour temperature of lighting these days, including LED. However, seeking high outputs will tend to keep colour temperatures high to avoid losing output in a filter.
I would hope that somebody out there has done the science for the effect on pilots when changing lighting regimes or viewing instruments.
Join Date: Nov 2003
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comparison photo's
my application of the technology may defeat this but a good comparison of led light bars is on the second page of this discussion. Further youtube test on bottom of page 6 for comparison and they are available ex south australia.
LED Light Bars? - Page 6 - Australian LandRover Owners
maybe the bearded babbler can borrow one for a trial.
LED Light Bars? - Page 6 - Australian LandRover Owners
maybe the bearded babbler can borrow one for a trial.
