I am sure this is good in some sense, but the little laser pointer in your drawer puts out something like 15 Quadrillion Photons a second. Do the division.

10^15 - 10^9 = 10^6 seconds. A million seconds in hours is 16,666 hours on these detectors needed to keep up with the 'photon' output of that $2 laser pointer. Also, I object to what they actually mean metaphorically by a photon entering their device. (Or leaving the laser pointer, by the way.) These are not photons they are necessarily measuring just energy that can only be measured in quanta that we call photons (i.e., by the quantum observer that has mass, usually an electron in the emitter or receiver of the 'photons').

Nice demonstration of how "single" photons are measured (i.e., not singly) and what I mean as observable by direct experiment:

https://www.youtube.com/watch?v=SDtAh9IwG-I

P.S. I had to pick a low power laser pointer because a lightbulb would give a ludicrous number. As would a bit of sunlight.

Anyway, 'photons' do not exactly 'strike' their device. EM Energy is absorbed by their device in quantum amounts that we call photons. .Your fingertip absorbs more photons per second that this device by a long shot...a very long shot. Fiber optics transmit more 'photons per second' than this device, by a long shot. They mean 'entangled photons'. The error in entanglement is not simple environmental error. Handling more entangled photons per second just gives more opportunity that a pair survives the flight time in our rest frame. In 'photon' time a million mile flight is zero time (unless the photon energy gets disturbed or the medium slows flight time.) Again, nice progress, but get real describing it.