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Incandescent bulbs have a shorter life than most other lighting, an important factor if replacement is inconvenient or expensive. Some types of lamp, including incandescent and fluorescent, emit less light as they age; this may be an inconvenience, or may reduce effective lifetime due to lamp replacement before total failure.
Pipkin's new frosted bulb revolutionized the industry, allowing the manufacture of frosted bulbs that diffused the light without losing much intensity, and were strong enough to be commercially viable. [14] [15] [16] He went on to make many innovations to the light bulb and two decades later developed the soft white light bulb. [21]
The suffix after the G indicates the pin spread; the G dates to the use of Glass for the original bulbs. GU usually also indicates that the lamp provides a mechanism for physical support by the luminaire: in some cases, each pin has a short section of larger diameter at the end (sometimes described as a "peg" rather than a "pin" [2]); the socket allows the bulb to lock into place by twisting ...
This is the reason we see the engine designations G40 and G60 in the names of Volkswagen models in which it was used: Volkswagen Polo Mk2 GT G40 ( Typ 86c - Limited to 500 vehicles first series (all black, fog head lamps) and a second of approx 1500, standards colors plus 500 all black for French market only)
The phosphors used in the bulbs were somewhat brittle, necessitating care in handling. Shaking or jarring the bulbs would cause flaking and migration of the phosphors to other parts of the metallic sculpture. Such handling would leave non-fluorescing portions of the sculpture and/or migration of phosphors to other surfaces within the bulb.
The G40 and G41 was based on an Intel Pentium 4 [1] [2] [3] and was released as low-end, affordable and massive successors [4] of Pentium 4-M-equipped 15" ThinkPad A31 and 14" ThinkPad T30. Both models has a 2 screen size options: the 15" and 14.1" screens with same case.
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