Living-room HID uplighter v.4.3

Here's a closeup shot of the latest version (gen 4.3) of the HID uplighter in my living room, showing the 65 W Philips CosmoGold in operation (this lamp replaces the Philips SDW-TG 50W in the previous version of the system). I have added a glass sleeve around the lamp to increase its operating voltage beyond 55 V so as to not trip the under-voltage safety protection of its electronic ballast (Philips DynaVision CDO 70W). Interestingly, Philips designed its CPO-TG lamps with a low operating voltage (around 55 V) in order to increase the source luminance by way of a shorter arc. This ensures a good optical compatibility with CosmoWhite (CPO-TW) lamps, which were intended to share the same optics. Unfortunately, the CPO-TG was never released on the market due to too little advantages compared to classical high-performance high-pressure sodium lamps. At least, it is put to a good use in my living room, to provide some extra-warm colored light during cold dark days, which are quite frequent in the Netherlands, where I live. That lamp color is similar to that of Deluxe HPS lamps and it combines very well with cold bluish daylight.