(a) Comparison of \dndetaphotonlab measured at forward rapidity in INEL pp collisions for various center-of-mass energies, (b) average photon multiplicity within 2.3 $< \etalab <$ 3.9 as a function of collision energy in INEL pp collisions. The results at 0.9, 2.76, and 7 \TeV are taken from Ref. .