Re: solar garden lights improved after wintering outside
- From: legg <legg@xxxxxxxxxxxxxxx>
- Date: Tue, 28 Jun 2005 04:42:26 GMT
>On Thu, 19 May 2005 03:21:13 +0000 (UTC), don@xxxxxxxxxxxxxx (Don Klipstein) wrote:
>>In article <5qin81pcr1ojvvvb728olmrqul6v0mev5m@xxxxxxx>, legg wrote:
>>>
>>>There are two different brands of garden lights with differing
>>>internal construction, components and battery brands, sitting in the
>>>garden outside our kitchen window.
>>>
>>>In the first summer of operation, I was dissapointed to see them
>>>dimming after only 3 hours of post-sunset illumination, even on the
>>>brightest of days. I even modified one, so that the LED's schematic
>>>position didn't arbitrarily limit the charging voltage, without any
>>>noticeable improvement.
>>>
>>>This spring, after spending the winter entirely submerged in snow,
>>>they all illuminate for at least 8 hours after sundown, even after
>>>relatively gloomy charging days.
>>>
>>>Anyone care to speculate on this beneficial aging effect in the
>>>generic solar light product?
>>
>> My best guess: The LEDs are less conductive at lower temperatures.
>>
>snip
>>
>> - Don Klipstein (don@xxxxxxxxx)
>
>Don, this is a permanent (~) change, present even now that spring is here.
..........................
It's midsummer, and they are back to their usual performance, lasting
less than three hours from sundown.
I suspect that there's just less light to collect out there, once the
neighbourhood trees are fleshed out with leaves. Though a signifigant
proportion of those nearby are evergreen, these have greater blocking
characteristic for a northernly oriented sun's path.
RL
.
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