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Early Federal Highway (FHWA) Tests on older 6 x LED LEDline® Safety Guidance product.

FHWA Pressure Test: Placed flat onto a steel bench, the LEDline® safety guidance lighing successfully endured some +89,000 lbs. of direct loading pressure, without fracturing or even damaging it's lens.
FHWA Strength Test: Suspended across two steel supports, 50mm (2") high, placed some 55.9cm (22") apart, the LEDline® lamp, by itself, without its standard Mounting Plate, was bridged across these supports. Approximately 1,050 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: LEDline® is installed into a small pavement groove with glue, and the LEDline® lamp is always within its Mounting Plate. It is therefore, always fully supported within the groove on three sides by the glue.) Despite this unprecedented test of the LEDline® guidance lamp being bent 75mm (3") out of true, this 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 2" high steel supports. To test the strength of the LEDline® safety guidance lamp, the machine put the 1,050 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. For copies of the report, please contact HIL-Tech.
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.)
Despite Being Bent and Pressure Tested, Without Its Mounting Plate, there are no cracks or marks and the unit still lights! Below is A Picture of The Lit LEDline® Unit After Being Bent Some 75mm (3") Out of True.
  • FHWA Also Tested LEDline's Compressive Strength. When surface-mounted, (again without its Mounting Plate),
  • LEDline® withstood the maximum loading of the machine
  • of 89,000 lbs. = 40.37 tonnes or 44.5 tons, on its 40mm (1.6") wide face surface.
  • LEDline® passed the test and there were no marks on the lens.

An unusual test; A LEDline® safety guidance unit was placed on the road surface and a 20,000 lb. pavement roller rolled over it several times.

The June 2021 Roller Test: LEDline® Safety Guidance Units Are Tough! A lit LEDline® guidance unit was placed on top of the road surface. A 10-Ton (20,000 lbs.) roller was repeatedly driven over it. The LEDline® Stayed Lit and Passed The Repeated Roller Tests! (See the video on the LEDline® Safety Guidance and the 10 Ton Roller Test, Page 5.)
The World's First Lit In-Pavement Freeway Exit Sign and Symbol: An impossible-to-miss 30 MPH Sign and 90º Hard Right Arrow was placed within the road to warn drivers of the hard right turn ahead of them. ( Note: In-pavenment lit signs that one must physically drive over are impossible-to-miss.)
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. Earlier Canadian Navy Waterproof/Submersible MIL-SPEC. Tests for Submarine escape Chamber. (Note: For use as lighting for submarine escape chambers, early LEDline® units were successfully MIL-SPEC. Tested down to 300m (approx 1000ft.) seawater depths by the Canadian Navy, they continued to function normally.) In addition, LEDline® was then, used as the lighting in the pressurization chamber. The LEDline® unit there was then repeatedly pressurized and de-pressurized at the 300m (1000ft.) seawater depths for thousands and thousands of times, again and again, all without any effect). (Note: After several years and some 5,000 repeat pressurization cycles had been reached, HIL-Tech stopped enquiring.)

at trade shows, DEMONSTRATING LEDLINE®'S TOUGHNESS: the following very unusual sudden Impact tests are done by passing viewers. Below are typical pictures and A VIDEO OF THE VIEWERs' LEDLINE® TRADE SHOW PRODUCT TESTING WITH THE POINTED END OF A ROCK HAMMER. HIL-TECH IS THE ONLY LIGHTING COMPANY THAT DEMONSTRATES ITS LAMP'S TOUGHNESS THIS WAY!

Video of LEDline®'s Trade Show Hammer Impact Test

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.