Responsively can be quoted in terms of either voltage or current output as volts per unit radiant energy or current per unit radiant energy at a given predominant wavelength or color temperature of source. A typical figure of voltage responsively is 3200 V/W. The frequency response of responsively means the change of responsively for different modulation frequencies (not radiated frequency), and this, as noted above, corresponds to a low-pass filter action with a peak at less than 1 Hz.