I like the idee.
Since ray of light gives you light quanta you could make the Light Source/Coherent Source cost 3 random quanta or a different type to make combos for dual/tri decks.
Perhaps... I think this has a lot of potential in being combined with other decks.
![Light :light](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/light18x18.png)
Mutations decks can get a nice boost making this a source of raw material.
![Light :light](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/light18x18.png)
Non-light decks can use this as a source of light quantum (the upped version)...
![Light :light](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/light18x18.png)
It can also be combined with adrenaline decks (get a 4 offence creature for every green nymph/source you have)...
![Light :light](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/light18x18.png)
This is cheap food for oty/scarb AND when combined with boneyard/bonewall it increases charge and creates skellies!
So yeah... a LARGE number of possibilities. This permanent can also make large miracle usage available for non-light centered decks...
The reason I made it cost light (and fairly little, only 3 to cast and 1 to make the creature) is because otherwise it may be a bit too OP. Also, it doesn't make sense to me if 3 or 5 drakness gets paid to make a ray of light :p