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m Maintain {{WPBS}} and vital articles: 1 WikiProject template. Merge {{VA}} into {{WPBS}}. Create {{WPBS}}. Keep majority rating "C" in {{WPBS}}. Remove 1 same rating as {{WPBS}} in {{WikiProject Glass}}. |
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Should we perhaps mention that the light tubes in the Berlin metro station (in the picture shown) costed a fortune and were mostly inneffective as light sources? [[User:SaintCahier|SaintCahier]] 22:34, 6 September 2006 (UTC)
:On my return from vacation, I found the pictures which were added to the article. Now, I´ve found (and integrated into the article) a reference for that installation in Berlin, but I have so far not been able to find details such as costs, effectivity, and even date of construction of that system. If your statement is supported by a reference, I guess we could write something of the sorts.--[[User:Chris Howard|Chris Howard]] 22:31, 18 September 2006 (UTC)
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*''A more recently developed improvement to light tube technology is the '''Collimating Tubular Skylight''', which adds a megaphone-shaped optical collimator to the top of the light tube to straighten out the solar rays entering the skylight above the roof. This collimator improves the efficiency of the tubular skylight by minimizing the number of bounces the solar rays make before entering the room below. Since each bounce (reflection) involves a significant optical loss (typically 8% or more since the specular reflectivity is typically 92% or less), the throughput efficiency is much higher for the collimating tubular skylight. When the light enters the room below, it is contained within a smaller angular region, providing better illumination in the workspace beneath the luminaire. This technology is fully described in U.S. Patent 6,363,667 and at the web site of [http://www.entechsolar.com Entech Solar, Inc.]''
We need to have some independent, secondary sources to show this variation has any notability before we devote a whole section to it. See [[WP:NPOV]], [[WP:V]], [[WP:PSTS]]. <b>[[User:Will Beback|<
== Solar bottle lights ==
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