As part of trying to move over to LEDs I am checking what size of lamps I have, most are the B22 or the smaller bayonet version. However I have three ceiling lamps that are a screw ga607 (I think) the screw part is
26mm diameter. In order to bring as many in line with the most common type as this is likely to be cheaper for LEDs would there be any issues in changing the lamp holder to a B22 size.thanks