Energy is conserved--for every out-of-phase pair resulting in darkness is an in-phase pair (or singleton--photons do interact with themselves) giving double brightness. To put it another way, the quantum waveform preserves energy in the absolute sense--what we observe involves the collapsing of the waveform, repeatedly, and the observed energy is preserved in a probabilistic sense.

__________________
-----
Todd (Bowie, MD, US, North America, Earth, Sol System, Vega region, Local Bubble, Orion arm, Milky Way Galaxy, Local Group, Virgo A Cluster, Virgo supercluster, the universe in which spock is clean shaven)

Quidquid latine dictum sit, altum sonatur.

personal page: http://blog.astrosketches.info