This 40W PLL Tridonic Combo Ballast is a High Frequency Gear that is a combination of electronic ballast and emergency lighting unit that offers a 3 hour emergency duration, a lightweight slim and compact housing and hot lamp restart in normal operation.
for Tridonic TCL Combo High Frequency Ballast 1 x 40w
It took some while because they did not have 1 of the products I ordered in stock. However, after I contacted them they added a slightly different but still good enough product for free. Really pleased with their service, quick response as well