Vintage industrial spotlight adjustable

I designed this model inspired by a vintage industrial spotlight adjustable
Check the model here: https://a360.co/3XpKYGD

BOM:

3 x Hex Head Screw M8 x 1.25 mm Thread, 30 mm Long
3 x Hex Nut Medium-Strength, Class 8, M8 x 1.25 mm Thread
5 x Head Screw Black-Oxide, M3 x 0.5 mm Thread, 12 mm Long
5 x Brass inserted embedment nuts M3x0.5 mm thread
1 x Light bulb
1 x light bulb socket