Whether a planet can support life depends on the size and brightness of its star, that is its 'sun'.

一颗行星是否能够维持生命取决于它的恒星--即它的"太阳"--的大小和亮度。

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Practically all the improvements in terms of life and brightness since then have come from the bulb-makers themselves.

实际上灯泡寿命和亮度的改进全部来自灯泡制造商自己的选择。

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Whether a planet can support life depends on the size and brightness of its star, that is its' sun '.

一颗行星是否能够维持生命取决于它的恒星——即它的“太阳”——的大小和亮度。

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"Paperwhite is the Kindle we've always wanted to build - the technology didn't exist to build a display with this level of contrast, resolution, brightness and battery life, so our engineers invented it, " said Jeff Bezos, Amazon.com Founder and CEO.

ENGADGET: Amazon announces $119 Kindle Paperwhite with illuminated, capacitive touch display

In lower light conditions that allow a reduction in brightness, the battery life increases accordingly.

ENGADGET: Toshiba outs Lumileo pico projectors, only one of which requires a plug

In case you are in need of a refresher, this DLP throws out the normal lamp in favor of a cluster of LEDs that will (hopefully) provide better color and a longer life with no brightness degradation.

ENGADGET: NuVision's 52LEDLP 1080p LED based DLP priced and dated HD