The Black Widow has an internal thermal sensor which activates an LED light that is underneath the translucent spider. At boot time the spider turns blue. When the internal system temperature goes 100 degrees Fahrenheit or higher the spider turns red. - Picture Story

TOM'S HARDWARE GUIDE > Articles > Special > Miscellaneous > DynaPower Black Widow Case

DynaPower Black Widow Case

7:04 PM - June 19, 2007 by The Editors of Tom's Hardware
Source: Tom's Hardware – Keywords: dynapower-black-widow-case
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The Black Widow has an internal thermal sensor which activates an LED light that is underneath the translucent spider. At boot time the spider turns blue. When the internal system temperature goes 100 degrees Fahrenheit or higher the spider turns red.