What happens to elaborated and repossessed Betalux emergency lighting?

After 15 years, the Betalux emergency lighting no longer emits enough light to meet legal standards. After replacement, the elaborated payment lights are collected and dismantled. The finished tube with a Tritium / Helium-3 mixture is returned to the factory in Canada. Tritium decays to Helium-3 (= noble gas) under the emission of Beta radiation. After 12.35 years (the so-called half-life) the tube contains exactly 2/3 Helium-3 and 1/3 Tritium gas. At the factory in Canada, the Tritium gas is separated from the Helium-3 gas and reused in new signs. The borosilicate glass is recycled.