FYI, there is some cool energy balance stuff coming in 2.42.6. Amoung other things, you can force the sun up or down if the total energy in the sim falls below or rises above specifed thresholds respectivly. This overrides day/night cycles if you have specifed such and allows you to keep the total sim energy below some max, above some min or within a specified range by controling the energy coming into the sim via autotrofs.
I've also added an option which turns off shot decay so that they essentially last forever, or rather, at least until they impact a bot. Very usefull for balancing energy loss in evo sims as shot decay is the main path by which energy leaves sims today. This combined with no decay corpse mode plugs most of the energy leaks in the system. The rest are the results of costs, which can be thought of as heat waste, direct conversion to venom, shell, posion, etc. or indrect conversion to waste.
When I get a moment, I need to write a long post on conservation of energy. There's a method to my madness I need to explain in depth at some point.