Aspire Tigon unregulated and wattage suggestions on 0.4 coils

Are the suggested wattage for the Tigon coils completely wrong? Or is the 0.4 coil not suited for the kit?

What I mean to say:
0.4 ohm coils are rated between 23 - 28 watt. So using them in a bypass device which pumps out (lets be mild) 4v actually pushes 40 watt to the coil.

So, am i missing something? Or are the 0.4 ohm coils super underrated for the suggested wattage?
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