The quality of light bulbs seems to have deteriorated somewhat.
They do not just burn out, as they are supposed to. Firstly they do not last that long and in the second place; they often explode scattering glass all over the place. This is extremely dangerous.
I was very pleased to discover that KSR Lighting in San Pedro supply all types of replacement quality lamps and bulbs available at wholesale prices. So it is well worth paying them a visit at the Poligono Inudtrial of San Pedro and stock up.