This is possible in vanilla minecraft but you need to have a strong understanding with commands., but i'm sure with mods and resource packs you could easily make any block emmitt light.
Just incase the person reading this does understand commands I'll drop one below.
.setLightValue() is the right name, replace this with a F value in parentesis, the glow stone value is 1.0F, the torch value is 0.9375F, this way you will know how much you want to make it bright, but 1.0F is the max!