Due to the relatively low angle of radiation and the cold color, it's hard to tell whether the brightness really a 60 watt incandescent lamp, or a 30-40 watt halogen lamp equivalent, subjectively I did it anyway as noticeably darker in comparison to the previously used 60-watt light bulb felt.
Otherwise, in order, the heatsink is quite hot, the glass but only lukewarm, only a very short delay when switching on, no flickering, no humming.