What sort of light fitting is this??

[ban-all-sheds]

What would the steps be to replace it with a regular bulb holder?

1. Get your new lampholder. And lampshade - the sizes are different, so your existing shade won't fit the new lampholder. If you really love it, and can't find a replacement you like then buy a replacement 4-pin DD lamp instead....
   
2. Connect a length of flex to the lampholder, which if it's plastic will only be 2-core flex. Pay attention to any strain-relief hooks that the conductors loop around.
   
3. Turn off the power - preferably all of it, not just the lighting circuit, but if that really can't be done then turn off all of the lighting circuits, not just the one that light is on.
   
   See here for why: //www.diynot.com/wiki/electrics:sneutral
   
4. Unscrew the ceiling rose cover, make a careful note of where the existing flex is connected - ideally take a photo, again take note of where the conductors pass through any strain-relief hooks, and remove it.
   
5. Use the old flex as a template for stripping the sheath off the new one, thread it through the cover, wire it in and replace the cover.
   
6. Put the old pendant and flex into the box of odds-and-ends that might come in useful one day.
   
7. Turn the power back on.

 

[OasisFan79]

I'll pick up the pendant sets at the weekend - might as well change the upstairs and downstairs at the same time.

Toolstation seem the be the best value at about £1.08.

 

[333rocky333]

Cheap aint always best, some are made from all plastic, i personally prefer the ones with a metal part formed into it to hold the Bc lamp pins more secure