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www.ultimatehandyman.co.uk Forum Index -> Electric Forum UK
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handyman
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Location: Alderley Edge, Cheshire
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Stoday
Electricity economics consultant
Joined: 20 Jan 2006
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Location: Sitting on the Bog
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 Posted: Wed Aug 13, 2008 9:37 pm Post subject: Re: led light bargain |
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| handyman wrote: |
They only draw 1.5w . |
So why does the spec say "max 12±0.1W"?
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handyman
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| Posted: Thu Aug 14, 2008 6:41 am Post subject: |
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ok, its 1.2w............its got 12 x 0.1 leds which are concentrated onto a funky looking reflector which then throws the light out
for only a 1.2w draw, its amazingly good
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Last edited by handyman on Thu Aug 14, 2008 6:56 am; edited 1 time in total |
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IDontBelieveIt
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Joined: 29 Jul 2008
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Location: North Hampshire
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| Posted: Thu Aug 14, 2008 6:54 am Post subject: |
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Picking up on Stods comment HM - the specs state
"230V 50Hz. H x Dia. 176 x 76mm, extension 143mm. 12 LED max 12±0.1W.
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So that really IS 12 watts. Do you mean 1.2 watts per LED? in which case agreed (ish)
A few things about these low watt lamps LED's included HM -
They don't work with the average dusk to dawn sensor and they don't work with most dimmers either because most dimmers and sensors have a minimum holding current and these low energy lamps are well below this minimum.
If you try to circumvent the minimum holding current problem with a dimmer and say fit a single GU10 on the circuit the LED lamps will last about 2 weeks then they will blacken and die.
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handyman
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| Posted: Thu Aug 14, 2008 7:00 am Post subject: |
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balls  not as good as i thought ..........and why its better than i thought it would be
looks really nice though 
So, all i have done is change the horrible light units i had with nicer ones, and not saved any energy
they appear to work with the dusk till dawn sensor fine...........dont get why it wouldnt? I understand the dimmer not working, but not why the dusk/dawn wouldnt work. Just got one lamp connected to a dusk/dawn in back garden, so is drawing very little. Must just be ok with it (a bnq special )
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Last edited by handyman on Thu Aug 14, 2008 7:13 am; edited 1 time in total |
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handyman
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Location: Alderley Edge, Cheshire
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Stoday
Electricity economics consultant
Joined: 20 Jan 2006
Posts: 3080
Location: Sitting on the Bog
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| Posted: Thu Aug 14, 2008 9:45 am Post subject: |
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Does the package quote the lumen output HM?
If it doesn't, then Screwfix is not complying with The Energy Information (Lamps) Regulations 1999, SI 1517.
Naughty!
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handyman
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| Posted: Thu Aug 14, 2008 10:47 am Post subject: |
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looked at the light, box and instructions, and there is nothing on them to say the lumen output or the watts of the unit.
Have e mailed then so they can confirm the watts.........
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IDontBelieveIt
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Location: North Hampshire
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| Posted: Thu Aug 14, 2008 11:09 am Post subject: |
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The reason it works with the dusk > dawn sensor HM is, probably, due to the sensor using a relay to switch the load rather than a triac/scr (which is why most dimmers have problems with low energy loads as they tend use triacs).
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handyman
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| Posted: Thu Aug 14, 2008 11:30 am Post subject: |
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yes.......it does make a 'click' when it switches on........that will explain it
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handyman
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Location: Alderley Edge, Cheshire
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| Posted: Thu Aug 14, 2008 3:48 pm Post subject: |
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sfd emailed back and say then need to look into this further. He did say that 1.2 watts sounds correct, and I cant find any 12 watt led lights (ie 1 watt x 12 clusters)
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