The Tilley FL10 was marketed for shafts and night fishing as well as constructional and mining work. Rated as 5000 candle power (reflected) it acts more like a spotlight than a flood light and I suspect would need to be suspended at 20 feet or more. This one has a tank from an IL33 and I expect not original. It could be that Tilley were using parts from other models but I tend to think its a replacement. I have an OL50 tank that I will probably put on this one and give it a cut and polish then. This great big juicy gem of a lamp weighs 19Lbs before fuel and will burn for 30 hours when filled up. The before shot And the working shots. When I manage to get it suspended at a reasonable height I'll add that shot too.