Simply upgrade your M-100-FL Microscope from a traditional BA15D bayonet 220-240V filament bulb to LED.
This BA15D LED gives a white light .6 W / 20 lumens providing better viewing.
It is more efficient, produces less heat and will outlast the traditional bulb considerably.
The BA15D bulb is commonly used in sewing machines.
This LED BA15D is a great upgrade.