I think if they're at the same frequency then they will appear to - the LED has a much sharper on/off curve than anything else. Certainly in one of the places

I think if they're at the same frequency then they will appear to - the LED has a much sharper on/off curve than anything else. Certainly in one of the places I work they have new LED lights in the toilets and it's quite disconcerting as the strobing effect is noticeable. The LED lighting in the streets in my town (Bournemouth, UK) doesn't exhibit this, but certainly is very 'blue' at first, and my mother (who lives there) didn't realise the effect of the blue light in terms of sleep; she used to leave her curtains open at night and wasn't sleeping well. Closing them has helped greatly in that respect.