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Lighting Ud

The search tool seems useless on my IPad so forgive me for asking something that has likely been answered before. Why is voltage drop restricted to 3% while other loads are allowed 5%?

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  • I sit here under a couple of LED lamps, which are rock steady although they weren't a few months ago. When I went through my check-box routine earlier, we were on 238 V.

    My LED head torch works far better on a low voltage than an incandescent lamp, but does get steadily dimmer with useful light going at about 1.15 V per cell.

    So my inclination is that LED luminaires could cope perfectly well with a 10%, if not 20% VD.

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  • I sit here under a couple of LED lamps, which are rock steady although they weren't a few months ago. When I went through my check-box routine earlier, we were on 238 V.

    My LED head torch works far better on a low voltage than an incandescent lamp, but does get steadily dimmer with useful light going at about 1.15 V per cell.

    So my inclination is that LED luminaires could cope perfectly well with a 10%, if not 20% VD.

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