What does "efficient at low power levels" mean?

System

I see this and the high power level version on things but dont really understand what it mean. Is it better for the ozone or something?

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Efficient at Low Power levels (like combat impulse engines) work better if you keep your engine power near a minimum, while Efficient at High Power levels (like hyper impulse engines) work best if you keep your engine power high.

You fly slightly faster if you keep the power level at the necessary level, is all.

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^^What he said.

I used Combat mk II's, set at min power, I was going 12.5 impulse. I switched to (Regular) Impulse Mk III and slowed to 11 impulse, despite the fact that it says it has a higher flight speed. I didn't try it with engine power high.

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Neuman wrote: »

^^What he said.

I used Combat mk II's, set at min power, I was going 12.5 impulse. I switched to (Regular) Impulse Mk III and slowed to 11 impulse, despite the fact that it says it has a higher flight speed. I didn't try it with engine power high.

Even if you have combat impulse engines, you will still go faster with higher engine power, though not as fast as if you had regular impulse engines, which would still be slower than hyper impulse engines.

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OK Cool. Thanks much.