Early Federal Highway (FHWA) Tests on older 6 x LED LEDline® Safety Guidance product.
FHWA Pressure Test:
Placed flat on a steel bench, the LEDline® safety guidance lighing, successfully endured
some +89,000 lbs. of direct loading pressure without fracturing or damaging the lens.
FHWA Strength Test:
Suspended across two steel supports, 50mm (2") high, placed some 55.9cm (22") apart, the LEDand placed approximately 55.9cm (22") apart, the LEDline® without its standard Mounting Plate was bridged across these supports. Some 1050 lbs. of directed pressure was concentrated in the middle of the unit. This bent the LEDline® guidance lamp, some 76m (3") out of true. (Note: When LEDline® is installed into its in-pavement groove, the LEDline® safety guidance lamp is placed within its Mounting Plate, so it is always fully supported on three sides by the glue in the groove.)
Despite this unprecedented test of the LEDline® guidance lamp being bent 75mm (3") out of true, this older style LEDline® unit continued to function normally. As the picture below demonstrates, the clear matrix was undamaged.
The Pictures Below Show the Results of Two of the FHWA Tests. The Left picture shows the FHWA Strength Test Bed, with the LEDline® lamp (without its Mounting Plate) bridged across the two steel supports. To test the strength of the LEDline® safety guidance lamp, the machine is about to be used to put the 1050 lbs. of direct concentrated loading onto the lamp's middle, which will cause it to bend some 75mm (3").
The Right Picture is of the FHWA Pressure Test when the LEDline® safety guidance unit is flat on the steel plate and has 89,000 lbs. of direct loading put on it. The LEDline® guidance unit survived and sustained no damage.
Please Concontacttact HIL-Tech for the complete report.
FHWA Strength Test: The above picture shows how the LEDline® guidance was suspended between two steel supports and some 1050lbs. of directed force was concentrated onto the middle of the unsupported LEDline® guidance unit, bending it 75mm (3”) out of true.
FHWA Pressure Test: Placed flat on a steel bed, the LEDline® guidance unit successfully endured +89,000 lbs. of direct loading pressure without fracturing. (See the pictures below.)
Bent and Pressure Tested, Without Its Mounting Plate,
Below is The lit LEDline® Guidance Unit After Being Bent Some 75mm (3").
There are no cracks or marks and the unit still lights!
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- FHWA also tested LEDline's Compressive Strength. When surface-mounted, again without its Mounting Plate or glued into a "U" Channel, the LEDline® withstood the maximum loading of the machine, 89,000 lbs. = 40.37 tonnes or 44.5 tons, on its 40mm (1.6") wide surface
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as a comparison, in 2021, A LEDline® safety guidance unit was again subjected to an unusual test, this time with a 20,000 lb. roller.
The une 2021 Roller Test: Today's LEDline® Safety Guidance Units Are Still Tough !
Here, A Lit LEDline® Guidance Unit, was placed On Top Of The Road Surface,
And A 10-Ton (20,000 lbs.) Roller, Repeatedly Drive Over it.
It Stays Lit and Passes The Repeated Roller Tests!.
(See the video on the LEDline® Safety Guidance 10 Ton Roller Test Page)
FHWA Temperature Test:
The LEDline® guidance unit was cooled down to -20°C (-4°F) for 8 hours then raised to +65°C (149°) for 8 hours. The temperatures had no effect on the light output.
(Note: HIL-Tech has tested LEDline® Safety Guidance units to the FAA standard Airfield Lighting Test Requirements;
-55C (-67°F) to +65°C (149°) again, there was no effect on light output).
FHWA Waterproof Test:
The LEDline® guidance unit was immersed in 1" (24.5mm) water. It easily passed.
(Note: For use as lighting for submarine escape chambers, early LEDline® units were successfully tested down to
300m (approx 1000ft.) seawater depths by the Canadian Navy, they continued to function normally.
LEDline® was then, used as lighting in the pressurization chamber, the LEDline® unit there was repeatedly
pressurized and de-pressurized at this 300m (1000ft.) seawater depth thousands and thousands of times, again, all without any effect).
(Note: HIL-Tech stopped enquiring after a few years and some 5000 repeat pressurization cycles had been reached.)
DEMONSTRATING LEDLINE®'S TOUGHNESS, The following very unusual sudden Impact tests are done by passing viewers at most trade shows. The latest was at the DENVER 2023 AAAE (American Association of Airport Executives) Convention. HIL-TECH IS THE ONLY LIGHTING COMPANY THAT DEMONSTRATES ITS LAMP'S TOUGHNESS THIS WAY! The typical pictures and video below were taken at the OTC (offshore technology Conference) Trade Show.
Video of LEDline®'s Hammer Impact Test at the OTC trade Show.
We know of no other lamps that would survive this abuse on their lens.
Unless otherwise stated, all Pictures, Videos, Files, and Texts are the Copyright of HIL-Tech Ltd.LEDline® is a Registered Trademark of HIL-Tech Ltd.