Airy disk brilliance (the brightness of a point-source stellar image) is proportional to the fourth power of aperture.

艾里斑的亮度(点光源恒星的图像亮度)正比于孔径尺寸的四次方。

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This isn't a liable solution, because when the billboards turn to follow the camera, their Angle relative to the light source will change, and so will their brightness.

这不是一个主观的解决办法，因为当粒子块朝向摄像机时，他们与光源的角度会改变，他们的亮度也会随之而变。

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Remember earlier when I said that high brightness LED point source lighting has become affordable?

还记得我前面提到，高亮度led点光源照明已经可以负担得起了吗？

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To further reduce power consumption, a "no source detected" mode automatically lowers brightness to 30 percent when no display has been detected for more than three minutes.

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With overhead lighting or a strong background source, you'll have to squint past reflections to make out the screen, even at full brightness.

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