| General > General Technical Chat |
| I thought LED lights were efficient? |
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| wraper:
It will increase voltage ripple but not so much that lamp should stop working. |
| CatalinaWOW:
Efficiency is good, but often isn't a sensible metric to drive replacement. I have outbuildings used primarily for storage. The lights are operated only a few hours a year. Damage to the environment from the manufacture and installation of high efficiency units would exceed the savings in operation. While LED lights would be better light, turn on faster etc. it just doesn't make sense to change them. A shop used only some evenings and weekends is a less extreme case but may have the same answer. |
| Siwastaja:
--- Quote from: wraper on May 27, 2022, 09:10:41 am ---ESR increases but not that much to break operation of something which is not broken by design and is not marginally operational at room temperature (unless cooled to extremely low temperatures). --- End quote --- Yes and the increased ESR causes increased power dissipation in the capacitor, heating it up, causing the ESR to drop again In even remotely acceptable design, one could expect a tad more flicker in cold weather, especially for the first few minutes after turning on. But of course, everything is possible, you can fail designs in very peculiar ways, even if physics is on your side. |
| Northy:
New lights are here, very flimsy, I think the knock offs I sent back might have been better built :palm: Oh well, never mind. I'm tempted to open them up and look at how they are driven. See if the LEDs are being grilled! G |
| Northy:
OK, I popped the ends off quickly....... There is a driver PCB in each end of the light (although the mains wire only goes into one end). The PCBs look well made to me, but it’s also interesting that they don’t fit in the housing as it looks like they originally designed to do (there’s some small features in the plastic that are there to kind of hold a board) as they are smaller than the features and held in with that white snot glue stuff. The main ‘body’ of the light is plastic, no aluminium to be seen - this also gives me hope they are not overdriving the LEDs and just producing heat? Maybe they have figured out that using more LEDs and no aluminium (as heat sinking) is the cheapest way to produce them. Anyway, I'll fit them at the weekend and see how they go. G |
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