This set of 3 boards will replace the old metal bayonet lamp sockets that have become unreliable with easy to change 555 style.
You can use either LED or incandescent type.
The board set comes with instructions, a chart of the lamps, standoffs and hardware.
If you need the twist sockets, they are available separately on this web site.
Installing it involves unsoldering and resoldering each wire one at a time.
Late change, the design was modified so that the big board is split into two boards to make install easier.