The LIGN Light has featured in Germany's number 1 scuba mag TAUCHEN. A great review was written by Thomas Christ (Editor) who personally tested the product.
Translation:
LIGN Light – Intelligent Flashing Light with Sensor
Not a gauge and not a light: instead, the LIGN Light is a clever combination of both. The new safety accessory, involving a visual alarm linked to a dive computer with high-pressure sensor, is installed at the first stage high-pressure outlet (with an additional short high-pressure tube being an option).
Turning now to the valve, as the valve opens, the Lign Light briefly flashes white and red, indicating to the diver that the Lign Light is operational. At 100 bar, the cylinder causes the light to start flashing white, informing one’s fellow diver(s) that it’s time to head back. At 50 bar, the light changes to red. Requiring four AAA batteries, the Lign Light’s LEDs can flash for up to 60 hours. When the detected pressure is greater than 100 bar, or when not in use, the Lign Light enters sleep mode. For more information and a detailed video demonstration, visit www.lignlight.com.