  We suggest a procedure of the lightest glueball detection in a head-on
collision of photons whose center-of-mass energy is in the range $1.3-2$ GeV.
Recent evidence for the scattering of light by light in experiments at the
Large Hadron Collider is used as a phenomenological basis of our suggestion.
With this evidence, the cross section of the lightest glueball creation in the
$\gamma\gamma$ collisions is estimated to be $\sim 60\,$nb. The predominant
mode of the lightest glueball decay, predicted from the gauge/gravity duality,
proves to be the decay into two neutral vector mesons $\rho^0\rho^0$. Because
$\rho^0$ decays into $\pi^+\pi^-$, a drastic increase in the
$\pi^+\pi^-\pi^+\pi^-$ yield is expected as the center-of-mass energy of the
colliding photons approaches the value of the lightest glueball mass. This fact
may be regarded as the unique signature of the lightest glueball detection.
