I put a 3W 240 v. LED MES bulb in a desk lamp but, as it's a tad on the heavy side, the lamp's plastic joints don't hold the arm up as required and it sags. This is a half size version of an anglepoise without balance springs and the arms are held up by tightening wing nuts on the joints. What sort of friction material could be put in the joints to stiffen them up while still allowing adjustment. The plastic material is fairly hard and glossy, a bit like the keyboard I'm typing on.
rusty