What about this?
For reference
"Light Emitting" is not defined rigorously.
At the very least, the proposed buff should allow the photons to power hope on the turn that they are played.
It would also change their role to allow Hope to be played on the same turn without needing to wait for quanta production (in contrast with RoL)
I like the buff. Its subtle and changes the utility of the card from its upped counterpart.
I would actually want to include both photons and rays of light in a hope deck if this buff were implemented.
The photons would help push out the hope shield followed by luciferin. Once hope is up, you would then switch to RoL.
Lastly, the buff provides photon with the ability to fill a unique niche as a weak counter to quanta denial. A niche not yet filled by any other creatures (which do not produce quanta when played). It would make the photon very unique.