On Tue, 05 Apr 2016 10:47:57 +0100, The Natural Philosopher wrote:

====snip====

And, sticking what amounts to a capacitative load on the mains is going
to make the Grid happy, to offset all those inductive loads in motors
etc.

If enough of this type of lamp comes into common use in households
nationwide, the national grid may become rather *unhappy* at such a
destabilising level of leading current appearing in the grid.

It's not just cheap emergency gensets that suffer uncontrolled voltage
regulation due to a 3 or 4 mF capacitor being placed across their 230v
2.8KVA output which, in the case of a 4.7mF load sent such a genset's
output voltage north of the 270 volt mark.

The PSUs (Public Supply Utilties) only require that such industrial
inductive motor loads be corrected to a lagging PF of 90% which suits
both the PSU and its industrial customers since the cost of such PFC
equipment would be doubled if they required these customers to fully
correct to a unity PF.

--
Johnny B Good