Thanks
Funny thing; I just looked up the theoretical light output of this emitter @ 1A, and it is 218 lumens.
Incandescent bulbs output around 16 lumens per watt, so the original 15w bulb should have been about the same at 240 lumens (the difference is too small to matter).
I wonder why the LED seems SO much brighter?
I presume it must be the different color temperature (the bulb emitted a yellowish light).
The LED is much more efficient. It is running at 3.5w, which is why it remains cool to the touch