Allow LightningAttractorPrototype to support negative efficiency

[Arcus]

Would it be possible to add support for negative values to the efficiency of lightning rods? The idea is to allow you to have lightning strikes that require excess power to protect against instead of generating power, as a modded environmental hazard.

[MrSmoothieHuman]

+1, seems like a cool idea - even if it was a separate parameter and not directly “negative efficiency”

[protocol_1903]

+1

[Bilka]

What happens if there is no more energy left in the energy source?