[jambutty]

Right i'll attempt again to explain it though my patience is thinning.

Am I supposed to tremble in my boots because your patience is thinning Cyfr. That’s a bit presumptuous isn’t it?

You can *not* use a calculator to determine how good or 'bright' a light source is.

Why not? In any case who the heck are you to tell me what I can and cannot do? A light meter, as used by photographers to determine the level of light falling on the subject, is nothing more than a solar panel in that the meter uses the light from the subject converted to a tiny electrical current to move a needle across a dial to indicate optimum aperture size and shutter speed settings.

So explain to me why when I spark up my fag lighter and hold the flame close to the solar panel the calculator works? The same goes for a candle flame or a flame from my gas stove. The glow from my computer monitor or TV screen. Explain to me why my calculator will not work the further away it is from any light source. Explain to me why my calculator will work with light from a blue bulb, a red one, a yellow one or a green one. I’ll grant you that I have to bring it closer to the source though. No doubt those coloured bulbs will also emit a little of the remaining colours but each bulb’s major emission will be in that colour. I don’t suppose that it would have anything to do with the intensity or brightness of the light would it?

You can't do this because calculators work from light energy.

Good! You finally agree with what I have been stating all along. The colour of light does not come into the equation just its brightness or as I prefer to call it the intensity.

All your blathering about the light spectrum is just a red herring.

Don't make such enormous assumptions such as "The energy consumed in making them compared to a normal bulb has to be more" because at the very least its a very misguided statement.

Here you go again trying to tell me what to do. Since when did you become my keeper?