The ir led strip  make 940nm and 850nm infrared can be seen with the eyes?
The answer is Can not. First thing we know,in general said, infrared light is 850nm or 940nm,Don’t that prove that it can emission of light as 850nm.there is a range of light it emits, and the 850 is its peak,
The peaksays it  weak and strong of light.but the light intensity to arrive at 0 light band ,still have a range, if in the visible light band, the spectral intensity (example: spectral intensity: the spectrum intensity is too small:lead in plant mineral element concentration increased,until more than soil the concentration of mineral elements,caused the plants to Water loss；Contrary too much: the root of aerobic respiration is reduced, resulting in mineral absorption is reduced or anaerobic respiration. ) also did not drop to zero point, of course you will be able to see.but The wavelength of light the human eye can see the longest is 770nm, when the spectral range of the infrared light emitted by 770, you will be able to see it.