Photons

Roughly: an average 5mW light emitting diode (LED) will emit over 1,000,000,000,000,000 photons every second.

A 100W Light bulb in order to emit 60 Joules per second, the lightbulb emits 1.8 x 1020 photons per second. (that's 180,000,000,000,000,000,000 photons per second!)

There has been a rough calculation that is very approximate estimating that our Sun gives off 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 photons Every Second.Most people are amazed by these numbers.

Light Sails

Space communications

NASA's LADEE spacecraft laser-based space communications system from the moon

photons interaction

How can we see the stars when space is full of photons moving in all directions?

Photon beams (Lasers)

Passing Interesting link

Solar Energy calculation

Can You See A Laser Pointer From The Space Station?