>>91569289Now, I can't find much info on the character so I don't know how they're supposed to function, but with mass chaos as the goal, I'd almost say that Blackout might almost work as almost like an EMP pulse - like a constant heartbeat. There's a charge up period, an outward wave, and then every light in a radius gets pulled inward, drained a little more with each pulse.
Maybe it's not all at once, but it'd mean a possible "aha!" moment for dealing with Blackout would be catching them in the middle of one of those pulses, or following the lava-lamp lights inward to locate the source of the drain. This might mean Blackout would be visible during each "beat", each outward pulse, until there were no lights nearby left to drain. Hell, maybe there'd even be a capability for some sort of super pulse than instantly absorbs a tighter radius, but fucks with the power use for a while in some way, like a panic button supercharge. Or some sort of "reverse" pulse mode where all the light absorbed can be pushed back out, either as energy blasts or back into light-able objects.
Just throwing ideas out. Obviously I don't know the character concept well enough to offer anything concrete, but hopefully it helped get you thinking, at least. I just like working with powers.