incandescent filter vs. monochromatic LEDs <br><br>I saw Beach Doc's reply, which give a simple explanation on red vs. blue. But your reply made me wonder if there's any significant difference between the light source for either color. My guess would be that red or blue from any source would have to have similar wave lengths, otherwise they'd be different colors altogether, and that the sole difference would be intensity. This may explain the difference in the dazzle effect as the filter will reduce the intensity of the light source as photons from the non-red spectrum are blocked, where as the LED generates the photons at the red spectrum wavelength and all are emitted. At least that's my layman's guess (which could be very wrong ).<br><br>Also, isn't the reason red results in better nightvission is that the rods in the eye are more sensitive to photons from those wavelengths?