It would seam reasonable that 2-3 times the area would equal 2-3 times the light, or an increase in effective range of 40%-70%. My limited experience with large reflectors involes patio doors coating with a reflective film. Even at a distance of over a mile, they were uncomfortable to look at.
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Hope for the best and prepare for the worst.

The object in life is not to be on the side of the majority, but to escape finding oneself in the ranks of the insane