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#1 Posted : 23 November 2006 15:00:00(UTC)
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Posted By Robert (Rod) Douglas
Hi Guys,

Quick question, an area on the ground floor of an office has poor lighting levels as the afternoon drags on from about 15:30hrs, lux levels dramatically drop to under 120.

It is going to be very expensive to install new
fixed lighting and there are only a handful of personnel that work in this area and they are not keen to be relocated to a more appropriate illuminated area.

Would appropriate desk lamps be sufficient?

Your thoughts and suggestions would be welcome before I start waving a big stick and move them.

Aye

Rod
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#2 Posted : 23 November 2006 15:11:00(UTC)
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Posted By Alan Hoskins
That's bright enough for walking about Rod, but obviously not for working. Mind you, the floor will be even less brightly illuminated than the desks, if that is where the readings were taken.

The problem with desk lights will be glare for other staff and the ratio of brightness between the work and the room when they do move around.

Chances are they will trip over or bump into something (or each other) if they don't let their eyes get accustomed to the lower level once they turn off the desk lamp.

Alan
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#3 Posted : 23 November 2006 15:17:00(UTC)
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Posted By Robert (Rod) Douglas
Thanks Alan,

The problem is not walking around it is actual bright enough for that it is the DSE work that they are undertaking they are complaining it is affecting their eyes.

I do not want to be autocratic insist they move, so Desk Lamps are my only alternative unless some Guru out there can give me a steer in the right direction.

Aye,

Rod
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#4 Posted : 23 November 2006 15:18:00(UTC)
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Posted By Ron Young
Rod,
Task lighting would be perfectly acceptable for this area.
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#5 Posted : 23 November 2006 15:33:00(UTC)
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Posted By andrew c
To increase light levels without replacing existing lights, or installing task lighting, there may be a third option.

As you might put a 100 watt lamp in to replace a 60 watt lamp, replacing fluorescent tubes will also improve light levels because

1) light output from flu. tubes decreases over time

2) modern "tri-phosphor" tubes are a bit brighter than the old tubes.

Also look at the light fitting itself. The "modular" fittings that are commonly recessed into suspended ceilings use a reflector to improve output.... is the reflector clean? Also the diffuser that is fitted in front of the lamps can have an effect... this should be an open "cat 2" louvre, not a sheet of opaque or translucent perspex.


Finally... furniture, partitions and wall colours! Dark surfaces will absorbe light, light ones will reflect more light. Just like photographers lay a white sheet on the ground in front of the Bride & groom on wedding photos to reflect more light.........
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#6 Posted : 23 November 2006 15:35:00(UTC)
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Posted By andymak
How about floor standing uplighters? We have successfully used this to improve lighting levels in offices where listed building status does not permit us to change the lighting units.

It does illuminate the ceilings very well, but the reflected light is nicely diffused and thus prevents glare.
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