Standard lamp

Non-printable Accessories you need: 

• Lamp holder E27, shade ring (for example: https://www.biltema.fi/en-fi/construction/electrical-installations/lamp-sockets/lamp-holder-e27-shade-ring-2000019531
• Cord with switch, unearthed (for example: https://www.biltema.fi/en-fi/construction/electrical-installations/lamp-sockets/cord-with-switch-unearthed-2000018076 
• Round rod ∅ 21 mm (for example: https://www.biltema.fi/en-fi/construction/fittings/skirting-boards/round-rod-21-x-1000-mm-2000055252
• Lamp E27

Print shade using 15% infill and another parts using 50% infill. The lampshade may need supports (depending on your printer). The lamp holder bracket needs supports. Base does not need supports.

It is not necessary to use glue to attach the round rod (the clearance should be tight).

Attach the shade to the lamp base holder using the lamp socket fixing screw.

Cable clips (as in photos) are optional, I used cable clips made by @koehler. For wooden parts I printed it upscaled to 105% and for the plastic parts 130%.

Make sure you have a license to do electrical installations or use an professional for electrical installations!