"HeyBub" wrote

"But there could be hope for those wanting to keep using the incandescent
variety – as retailers have found a loophole which allows them to get
around the new rules. The EU directive banning the 40W bulb, which comes
into force on September 1, refers only to those meant for 'household
lamps', meaning shops can continue to supply bulbs intended for
'industrial use' ”.

A "rough service" bulb is typically a bulb with a filament designed for a
higher voltage than its ultimate use, for instance 265 volts in Europe
instead of 240, or 125 volts in the USA instead of 110 volts. This means
that the filament burns dimmer and lasts far longer because it's not burning
as hot. It also means that it gives off more heat and less light, and thus
is less efficient as a lamp.

Another workaround that they're doing in Australia is selling incandescent
bulbs as "heat lamps" instead of as lights.