• Hi all and welcome to TheWoodHaven2 brought into the 21st Century, kicking and screaming! We all have Alasdair to thank for the vast bulk of the heavy lifting to get us here, no more so than me because he's taken away a huge burden of responsibility from my shoulders and brought us to this new shiny home, with all your previous content (hopefully) still intact! Please peruse and feed back. There is still plenty to do, like changing the colour scheme, adding the banner graphic, tweaking the odd setting here and there so I have added a new thread in the 'Technical Issues, Bugs and Feature Requests' forum for you to add any issues you find, any missing settings or just anything you'd like to see added/removed from the feature set that Xenforo offers. We will get to everything over the coming weeks so please be patient, but add anything at all to the thread I mention above and we promise to get to them over the next few days/weeks/months. In the meantime, please enjoy!

LED panel

They look really good. Do you have a link to the ukw thread. Any photos of installation in a workshop?

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Cheers Roger, will take a peek. I like the idea of nearly flush and for that price, if the brightness and colour are good, I could get a LOT in the shop.

Cheers
Mark


Sent from my iPhone using Tapatalk Pro
 
They don't look to be a staggering advantage over fluorescent tubes?

Fluorescent tube 58w 5400Lm = 93Lm/watt life 20000 hrs

Led Panel 48w 5000Lm = 104Lm/watt life 30000 hrs

Both get A+ efficiency ratings if they are to be believed

I cant find any information on the efficiency of the LED power supply module but maybe 90% so hardly anything to be saved on running costs.
So maybe more convenient, trendy and better light distribution but dearer initial cost.
Tube replacement much cheaper than replacement panels.

Bob
 
9fingers":tdfnd5w3 said:
They don't look to be a staggering advantage over fluorescent tubes?

Fluorescent tube 58w 5400Lm = 93Lm/watt life 20000 hrs

Led Panel 48w 5000Lm = 104Lm/watt life 30000 hrs

Both get A+ efficiency ratings if they are to be believed

I cant find any information on the efficiency of the LED power supply module but maybe 90% so hardly anything to be saved on running costs.
So maybe more convenient, trendy and better light distribution but dearer initial cost.
Tube replacement much cheaper than replacement panels.

Bob
Click to expand...

I've often wondered if there is an advantage of LED bulbs over CF too ?
 
To be honest once you have reasonable efficiency power conversion to get from mains voltage to whatever mix of volts and amps the light source needs there is not much efficiency gain to be had.

The energy input is simply making electrons jump about between different energy levels and making them emit light. Just down to basic fizzicks. Both leds and fluorescent tubes get gently warm as a result and not much more.

Basically if you can put your hand and hold it on a light source then virtually all your energy input is coming out as light and you won't improve on it.

Once you have taken running costs out of the equation comparison comes down to aesthetics, optical purity lifetime, capital and replacement costs some of which are hard to quantify.

Bob
 
bit more complicated in winter .. when you want to heat the house too ! lol .. we don't have any heating except the log burner and anything we plug in :shock:

I've just ordered some gu10 leds to replace 35w halogens in a set of 3 in a light fitting... most of our other light is CF

one day we'll catch up :-)
 
Tusses":1ljlgr53 said:
bit more complicated in winter .. when you want to heat the house too ! lol .. we don't have any heating except the log burner and anything we plug in :shock:

I've just ordered some gu10 leds to replace 35w halogens in a set of 3 in a light fitting... most of our other light is CF

one day we'll catch up :-)
Click to expand...

Totally Agree Rich!

The ban on the manufacture of filament lamps is madness when the need for home heating is considered.
For most homes, the lack of heat from super efficient lights which would otherwise come from highly efficient electricity generation running filament bulbs is replaced by burning extra fossil fuels in a less than optimum domestic sized boiler.

Bob
 
9fingers":18ja2lkf said:
Tusses":18ja2lkf said:
bit more complicated in winter .. when you want to heat the house too ! lol .. we don't have any heating except the log burner and anything we plug in :shock:

I've just ordered some gu10 leds to replace 35w halogens in a set of 3 in a light fitting... most of our other light is CF

one day we'll catch up :-)
Click to expand...

Totally Agree Rich!

The ban on the manufacture of filament lamps is madness when the need for home heating is considered.
For most homes, the lack of heat from super efficient lights which would otherwise come from highly efficient electricity generation running filament bulbs is replaced by burning extra fossil fuels in a less than optimum domestic sized boiler.

Bob
Click to expand...

Hang on a cotton-pickin' second......

Electrickery generation and distribution efficiencies are somewhere around 25 to 30% depending on where you live in the UK. (They were around 22% when I first started looking some 30 years ago....). The efficiency of a modern condensing boiler is in the 95 to 98% range. You are always better off heating your house via a domestic central heating boiler than by using electric light bulbs, and you always were, in terms of energy consumption.
 
(grabs a bag of popcorn and settles down to watch the show)

Sent from my Moto G (4) using Tapatalk
 
9fingers":wtivb2i2 said:
To be honest once you have reasonable efficiency power conversion to get from mains voltage to whatever mix of volts and amps the light source needs there is not much efficiency gain to be had.

The energy input is simply making electrons jump about between different energy levels and making them emit light. Just down to basic fizzicks. Both leds and fluorescent tubes get gently warm as a result and not much more.

Basically if you can put your hand and hold it on a light source then virtually all your energy input is coming out as light and you won't improve on it.

Once you have taken running costs out of the equation comparison comes down to aesthetics, optical purity lifetime, capital and replacement costs some of which are hard to quantify.

Bob
Click to expand...

Yebbut. Style. They really look cool man. Fluorescents are S...O... 1950's.
 
RogerS":10x2bnrc said:
9fingers":10x2bnrc said:
To be honest once you have reasonable efficiency power conversion to get from mains voltage to whatever mix of volts and amps the light source needs there is not much efficiency gain to be had.

The energy input is simply making electrons jump about between different energy levels and making them emit light. Just down to basic fizzicks. Both leds and fluorescent tubes get gently warm as a result and not much more.

Basically if you can put your hand and hold it on a light source then virtually all your energy input is coming out as light and you won't improve on it.

Once you have taken running costs out of the equation comparison comes down to aesthetics, optical purity lifetime, capital and replacement costs some of which are hard to quantify.

Bob
Click to expand...

Yebbut. Style. They really look cool man. Fluorescents are S...O... 1950's.
Click to expand...

Oh dear form over function lol

I reckon your panels will cost you virtually double fluorescents. When the tubes die they are less than £2 each
When you panels die they are f^&*ed and you will be buying new panels.

Bob
 
9fingers":12aoxrkd said:
Fluorescent tube 58w 5400Lm = 93Lm/watt life 20000 hrs

Bob
Click to expand...

Those figures will be when the lamp is new and operating at its ideal running temperature. If it is an open batten it will run too cool. As it ages the light output will fall off significantly - it may still work after x 1000 hours but its output may be 50% or less.

Don't think LEDs lose output over time but don't really know. Nearly all our lighting is LED now. Had some failures in the garden with some G4 12V ones I bought from china via ebay but that may be down to running them on AC instead of DC. Apart from that all still working fine indoors.
 
Mike G":2pxbiean said:
The efficiency of a modern condensing boiler is in the 95 to 98% range.
Click to expand...

Oh dear Mike you have been hoodwinked by the SEDBUK test results done under unrealisitc conditions eh?

You might start getting near with a very high spec house like yours but sadly a modern boiler can get no where near when fitted into most houses.

Bob
 
Mike G":licehkrs said:
..... The efficiency of a modern condensing boiler is in the 95 to 98% range. ..
Click to expand...

With a bit of luck, as Bob says.

But more importantly ONLY when they are in condensing mode. And condensing mode ceases above about 55 degree C. Which is way below the temperature where most folk run their boilers. So that figure of 95% is a figment of manufacturers imagination in reality.

Then if it's an oil-fired boiler you need to factor in the waste during the pre-purge and post-purge stages of each burn cycle.
 
9fingers":1f1v6h7h said:
....... sadly a modern boiler can get no where near when fitted into most houses....
Click to expand...

But seriously, in the worst possible circumstances, they aren't going to be anywhere near 30%, are they.
 
I've purchased one of these Roger. Two days from order to delivery, arrived yesterday.

Will fire it up this evening and let you know how it looks. Might do a little video.

Cheers
Mark


Sent from my iPhone using Tapatalk Pro
 
Busy with forum modifications last night but just managed to et out and do a quick video of this panel.

Need to do a bit more research on the light level/type and how close it is to daylight but based on this I think I'm liking it...

[youtube]cJSYMFxAvX0[/youtube]

Cheers
Mark


Sent from my iPhone using Tapatalk Pro
 
Looking here http://www.engineeringtoolbox.com/light ... d_708.html

it suggests "detailed mechanical work" needs about 1000 lumen/sq metre

Your shop at 30 sqm (i think?) = 30k lumen and your panels are specified at 5000 Lumen each so 6 sounds spot on.

I'm still torn between getting another box of 25 tubes at a quid each which might see me out or trying some of this newfangled lighting :lol:

Bob
 
Thanks for that Bob

My rationale for looking at these when Roger shared was the thickness. Almost flush mounted to the ceiling, could even be flush mounted if I can be bothered cutting out the plasterboard, means nothing hanging down to get clattered by turning around sheet goods or long lengths.

I was extremely pleasantly surprised at just how much light that single panel kicks out though for that price.

Cheers
Mark
 
I cannot view your YouTube videos Mark for some reason.
Other YouTube videos play fine.

f0d0a5670c5e5a7369281f60830ecc44.png


Rod
 
9fingers":3va1tdc4 said:
Equally strange that I could not view this the other day and tried several PCs
but now it is fine - no rebooting done either?
[youtube]qEZOg0iRe1g[/youtube]

Bob
Click to expand...


Computery things suck!
 
I'd suggest trying the panel somewhere you spend a bit of time, to make sure you like the light, before buying the rest.
Sometimes the LED light can be unpleasant after a while.
Also, if it has much blue light in it, it may mess with your sleep if you use it later in the day.
 
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