Cool finds! The Lite Mite is a cool fixture, a couple of members here have one. It dates from the 1950s, and originally came with GE Std. Cool White lamps. I suppose you could consider it the earliest form of a CFL, unless you count the 15 watt fixtures from the 1940s that screw directly into a lamp socket. The B&L 2x 4 watt desk lamp is also really cool. I know one member who has a single-lamp 4 watt version.
Indeed, 4 watt preheat strip lights run really hot. It's a fault of the Robertson L48 ballast, unfortunately. Schumacher and Vossloh-Schwabe made compatible ballasts which run much cooler and don't drive the lamp so hard.
Regarding the Westinghouse advertisement, I don't think they were talking about a new type of fluorescent lamp which emits UV light, but rather just fluorescent lamps in general. Although I have no clue how well of a substitute fluorescent light is for the sun. I get plenty of the former, but I'm still rather pale.
