I would guess the industrial units are a lot more robust, and most likely well heatsinked. The LED streetlighting is a lot more reliable, there have only been a few total failures since they were installed for the WC in 2010, though there are a fair number of dead modules. Having 3 per fitting does help with the reliability, if you consider a failure as all 3 being dead.
I have LED indicators that i made, that are still running 10 plus years later, being on near 24/7/365. To get that though I used 2 39K 0.5W resistors in series and a reverse diode, and potted the whole lot in epoxy resin.