*Bit outdated but hey!!! It's never late!
Hi Ivan and yes confirming BlackHawks response above, your math is correct.
However, that should not be accounted as a limitation.
If you are assuming 1 light particle (Or call it in layman lang a light beam) at a time, then yes you are limited BUT... think multi-thread/multi-core (How many "light beams" can you travel and read across on your limited surface