Have replaced reflector lamps in a very small corridor through this 4x4 Watt LED Spotlights 2x40 W Old (filament, E14) Osram. I actually thought that the number of lumens would be similar. This is not so, the LED are subjectively much brighter (min. 50%, probably would have but even 2 LED spotlights served). Now we have just a tanning salon ...
Turn-on time is approximately 1 second when the lamp is cold otherwise ~ 0s. Installation was ok, only the luster terminals sit in a slightly fiddly housing.