Standardising on light bulbs
Just buy LED bulbs from now on. They can replace any remaining Halogen or Fluorescent as they die.

The studio bulbs are cool, 4000K; the kitchen warm, 2700K.
The utility room bulbs are now museum piece LEDs.
Still a problem with the two stairway bulbs. They have to be incandescent because of the incorrect wiring.
Ryet LED 1000 lumens 9W 110×60 mm E27
good value (€8 for two) but 4000K cool
LED1742G9K4
Ryet LED 1055 lúmenes 10W 110x60mm E27
good value (€7 for two) and 2700K warm
LED1911G10
Ledare also available but can’t see the point – more expensive
Also bulbs in lower lumens, big globes and fancy filaments