To be fair, every light mentioned in this topic would be BS-legal if you cracked them open and removed the steady light function (since flashing only lights are legal over a certain - extremely dim - brightness). Obtusely only the fact that the light can be that bright constantly, rather than intermittently, makes them illegal as sole illumination.
Whether to worry about it or not is another question. Hardly anyone I see has pedal reflectors and many that do are illegal anyway because they are partly obscured by panniers.
It would be much better if we had an American-style legal test, i.e. that the bike must be fitted with lights front and rear which are clearly visible from X yards. That's easily tested by everyone, and it also takes care of lights with run-down batteries (strangely, if you have approved lights, so long as they're lit up, you're legal).