Comments on: LED Streetlights for Walnut Creek, Thanks to Federal Stimulus Funds? http://www.sloarch.com/2009/11/led-streetlights-for-walnut-creek-thanks-to-federal-stimulus-funds/ architecture in the real world Sun, 29 Aug 2010 21:32:57 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: sloarch http://www.sloarch.com/2009/11/led-streetlights-for-walnut-creek-thanks-to-federal-stimulus-funds/comment-page-1/#comment-61 sloarch Fri, 22 Jan 2010 23:07:26 +0000 http://www.sloarch.com/?p=481#comment-61 Thanks grandcanyondave. My numbers were wrong. The Times revised their article shortly after I posted the update. The city is actually paying $7,230 a month for the new LED fixtures, not $726. While not as dramatic the cost savings are still significant. I have corrected the numbers.<br><br>I show a sample calculation, I think that 14k is in the ballpark of what it would cost to operate 126 fixtures for a month.<br><br>The city also has now posted news of the change on their website. <a href="http://www.walnut-creek.org/news/displaynews.asp?NewsID=189&TargetID=1" rel="nofollow">http://www.walnut-creek.org/news/displaynews.as...</a>. They are reporting a savings of $9,810 per year! Which doesn't correlate with the numbers I calculated or what the Contra Costa Times is reporting. Thanks grandcanyondave. My numbers were wrong. The Times revised their article shortly after I posted the update. The city is actually paying $7,230 a month for the new LED fixtures, not $726. While not as dramatic the cost savings are still significant. I have corrected the numbers.

I show a sample calculation, I think that 14k is in the ballpark of what it would cost to operate 126 fixtures for a month.

The city also has now posted news of the change on their website. http://www.walnut-creek.org/news/displaynews.as.... They are reporting a savings of $9,810 per year! Which doesn't correlate with the numbers I calculated or what the Contra Costa Times is reporting.

]]> By: sloarch http://www.sloarch.com/2009/11/led-streetlights-for-walnut-creek-thanks-to-federal-stimulus-funds/comment-page-1/#comment-45 sloarch Fri, 22 Jan 2010 15:07:26 +0000 http://www.sloarch.com/?p=481#comment-45 Thanks grandcanyondave. My numbers were wrong. The Times revised their article shortly after I posted the update. The city is actually paying $7,230 a month for the new LED fixtures, not $726. While not as dramatic the cost savings are still significant. I have corrected the numbers.<br><br>I show a sample calculation, I think that 14k is in the ballpark of what it would cost to operate 126 fixtures for a month.<br><br>The city also has now posted news of the change on their website. <a href="http://www.walnut-creek.org/news/displaynews.asp?NewsID=189&TargetID=1" rel="nofollow">http://www.walnut-creek.org/news/displaynews.as...</a>. They are reporting a savings of $9,810 per year! Which doesn't correlate with the numbers I calculated or what the Contra Costa Times is reporting. Thanks grandcanyondave. My numbers were wrong. The Times revised their article shortly after I posted the update. The city is actually paying $7,230 a month for the new LED fixtures, not $726. While not as dramatic the cost savings are still significant. I have corrected the numbers.

I show a sample calculation, I think that 14k is in the ballpark of what it would cost to operate 126 fixtures for a month.

The city also has now posted news of the change on their website. http://www.walnut-creek.org/news/displaynews.as.... They are reporting a savings of $9,810 per year! Which doesn't correlate with the numbers I calculated or what the Contra Costa Times is reporting.

]]> By: grandcanyondave http://www.sloarch.com/2009/11/led-streetlights-for-walnut-creek-thanks-to-federal-stimulus-funds/comment-page-1/#comment-43 grandcanyondave Fri, 22 Jan 2010 13:54:15 +0000 http://www.sloarch.com/?p=481#comment-43 It looks like the cost savings may have been mistakely reported. I suspect that the 14K figure should have been 1.4K. See PG&E's current rates for High Pressure Sodium lamps per month at: <a href="http://www.pge.com/tariffs/LS2_Current.xls" rel="nofollow">http://www.pge.com/tariffs/LS2_Current.xls</a> <br>Most of the H.P.S. lights were 250 and 150 watt. It looks like the cost savings may have been mistakely reported. I suspect that the 14K figure should have been 1.4K. See PG&E's current rates for High Pressure Sodium lamps per month at: http://www.pge.com/tariffs/LS2_Current.xls
Most of the H.P.S. lights were 250 and 150 watt.

]]> By: sloarch http://www.sloarch.com/2009/11/led-streetlights-for-walnut-creek-thanks-to-federal-stimulus-funds/comment-page-1/#comment-16 sloarch Thu, 12 Nov 2009 01:12:18 +0000 http://www.sloarch.com/?p=481#comment-16 They actually do that in some cases. I personally like the white light, but some people prefer urine. They actually do that in some cases. I personally like the white light, but some people prefer urine.

]]> By: Ryan http://www.sloarch.com/2009/11/led-streetlights-for-walnut-creek-thanks-to-federal-stimulus-funds/comment-page-1/#comment-14 Ryan Wed, 11 Nov 2009 17:29:11 +0000 http://www.sloarch.com/?p=481#comment-14 Maybe they should cover the bulbs in urine-colored glass for "backwards compatability." Maybe they should cover the bulbs in urine-colored glass for “backwards compatability.”

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