citro wrote:Well in fact, it is precisely because my son reads in bed or does his homework within 30cm of these bulbs ...
Some clever little ones mix the V / m corresponding to an electromagnetic wave (and corresponding to a power flow of E² × epsilon_0 × c, in W / m², if E the effective field in V / m), and the corresponding V / m to a quasi-static electric field (because at 50 Hz) which carries almost no energy. In this regard, when you are outside, you receive a static field of 100V / m when the weather is nice, up to 10000V / m when a thunderstorm is going to catch. At these field levels, if it were electromagnetic waves, you would be dead!
So it is true that a conventional installation produces a quasi-static field, because between the neutral wire and the phase wire, it looks almost like a 110V wire, with a field which diverges from this wire. We can avoid this by putting a shield connected to the ground around each wire, but that does not have any interest.
On the other hand, I note that when I use a microwave oven, the table which is in front of the door starts to heat: that it is a beam of microwaves, much more dangerous!
Similarly, if I phone the cell phone for a few minutes from my apartment (in reinforced concrete), my head gets hot: not good at all!
Lamps, like the rest, are subject to electromagnetic compatibility (EMC) standards. These are very restrictive standards, because long before having a level which could have the slightest harmfulness, a device could emit waves which disturb radio communications. The level for consumer equipment is extremely low (15 times lower than for industrial equipment for example).
Chinese lamps are subject to it like the rest, however it sometimes happens that the Chinese remove components (capacitors, or sometimes inductive filters) allowing compliance with EMC standards. This is safe for the user, but it is bad for society because it disrupts telecommunications (in the same way as an electric motor without interference suppression). If the radio is jammed when you turn on the light, the lamp certainly does not meet the EMC standard.
Mobile phones are not subject to the same standards as they are equipment designed to emit electromagnetic waves. Neither are microwave ovens because the frequency is much higher than that defined by conventional EMC standards. And the fact that an oven is not dangerous at the time of the test does not mean that the doors will be airtight on all copies, or that they will remain so after a few years.