What is the mass of Photon or Light Particle? We know that any particle moving at speed of light will have infinite mass.
Since even Light has particles. Then what is the size of the Particle? How to imagine this with the mass of light particles.
 A: The mass of a photon is anywhere between zero and $10^{-18} ~ eV/c^2$.
https://en.wikipedia.org/wiki/Photon
No need to write photon or light with capitals, by the way.
A: Massive objects simply can not move at the speed of light. Light, or photons, are mass-less particles. They have 0 mass - which is why they can (and have to) move at the speed of light. 
A: From the special relativity theory you got the usefull relationship
$$E^2 = \Big(m\cdot c^2 \Big)^2 + \Big(p \cdot c  \Big)^2 \quad .$$
All experimental results up to now show that $m=0$ for a photon. Therefore
$$E^2 = 0 + (p\cdot c)^2 \\
E = p\cdot c = \hbar \cdot {k} \cdot c = \hbar\cdot \omega$$
BTW: In my opinion it is false to talk about relativistic masses as you did in your post. The  mass is invariant!
The equation can be simple derived by using the equation for a relativistic moment 
$$ p = \cfrac{m\cdot v}{\sqrt{1-\frac{v^2}{c^2}}} \qquad ,$$
and the relativistic energy
$$ E = \cfrac{m\cdot c^2}{\sqrt{1-\frac{v^2}{c^2}}} \qquad .$$
