A long long time ago I bought an Anglepoise lamp. In those balmy days it used an incandescent bulb, 40W it might have been. And in the fullness of time, it became obvious that an increased light output would be desirable. So I tried a 60W incandescent. Brighter ir was, but it started smelling due to excess heat. and in due course I had to rewire the lamp and change the lampholder.
And so, I moved onto a CFL. The only problem was that it was too heavy for the springs and although I tried to see if stronger springs were available, I eventually had to accept the gradual, or not so gradual, sinking of the head.
Recently I got fed up with this so went back to the 60W incandescent. Hello smells. Goodbye droop. But then I discovered that the lampholder was loose on its fixings so a further dismantling & repair work was required.
And just on spec, with no hope of finding anything, I typed into my browser "How to use andglepoise lamps with CFC bulbs". Yes, I know I got it wrong, but I ended up on a support page for Anglepoise and there was a table describing which bulbs were ok for Anglepoise lamps, along with their current availability status. And much to my delight, the recommended bulbs are either LED golfball or LED filament types, both of a 5 to 6 W power rating.
As it happens, about 15 months ago I had to re-arrange the lighting in our front room and ended up with golfball 5.5W LED bulbs in the wall lights. A quick "borrow" and yes, a good light and no droop. Into the stores and there was a 9W LED bulb. And an even better light and no droop. So problem solved. And ageing eyes relieved.
A few comments about CFL & LED lamps.
Our first CFL was a Phillips 20W which 20+ years later is still working satisfactorily. Since then we have found that Osram are satisfactory, whilst CFL's bearing such names as Megaman or similar are rubbish.
In respect of LED's, because our dining room is poorly lit, we have tried CFL's & 16W LED's, all of which have had a very short life, with the LED's starting to flash after a few weeks, this despite having a 5 year warranty. These LED's were made by either Ring or Bell. Not very good. In contrast, we now have 15W LED's by Crompton and to date they are proving satisfactory.
Here's hoping this may be of interest to someone!
Peter G. Shaw