LED light bulbs

elstimpo

Scoobs72 wrote: »

Elstimpo, what happened to your promised lab testing of Sillygoose's bulbs?

Sorry, been on holiday.

Details will be posted once complete. I'm afraid priority at the moment is going towards testing and developing my own spec LED Spots and not to the sillygoose inspired LED bulbs.

I haven't caught up with the test centre since returning from holiday so not sure where they are at. We test numerous products every week and my guys are thorough so i can take a bit of time.

elstimpo

baldelectrician wrote: »

They were Kosnic Power Led GU 10 - KLED05PWR/GU10

They have a 36 deg beam angle (similar to a normal lamp), and a rated life of 30,000 hours

The light rating is 60 lm/w and the colour is warm white

The manufacturer is out of stock until the start of August.

I'm surprised 330 warm White lumens on a 36 degree beam angle is enough to replace 50w Halogen.

elstimpo

Scoobs72 wrote: »

Elstimpo, what happened to your promised lab testing of Sillygoose's bulbs?

Here you go



We had the lamps checked for light distribution over a volumetric area.
d is directly under the lamp with measurements taken at 100mm intervals out to the 20d mark which represents a measurement taken at 40 degree spread. The RR is a fixed spot in space up near, but some 40mm below the ceiling. At this point you should note there were variances between units which is why we cannot set a fixed reading.

d 35-42
100 34-41
200 33-40
300 31-38
400 30-38
500 30-37
20d 23-27
RR 25-34

As a comparison, this is the readings from a good LED spot.
d 204
100 205
200 198
300 195
400 150
500 98
20d 17
RR 51

The lamps are not much use for closed fittings and heat dissipation registers about 10-15% more efficient than a 50w Halogen. We have not tested this bulb further and not conducted any component analysis and suggest we leave it there as far as this lamp is concerned

Scoobs72

elstimpo wrote: »

Here you go



We had the lamps checked for light distribution over a volumetric area.
d is directly under the lamp with measurements taken at 100mm intervals out to the 20d mark which represents a measurement taken at 40 degree spread. The RR is a fixed spot in space up near, but some 40mm below the ceiling. At this point you should note there were variances between units which is why we cannot set a fixed reading.

d 35-42
100 34-41
200 33-40
300 31-38
400 30-38
500 30-37
20d 23-27
RR 25-34

As a comparison, this is the readings from a good LED spot.
d 204
100 205
200 198
300 195
400 150
500 98
20d 17
RR 51

The lamps are not much use for closed fittings and heat dissipation registers about 10-15% more efficient than a 50w Halogen. We have not tested this bulb further and not conducted any component analysis and suggest we leave it there as far as this lamp is concerned

Hmmm...I though you'd be posting lux measurements at standard distances of 0.5m, 1m, 1.5m, 2m etc, along with the beam angle?

Mrs_Egg

I haven't had a chance to read through everything that has been said on here but it does seem a lot of people are confused in regards to LED with regards to what levels you can achieve, prices, quality etc..

I don't know if posting links to various websites is allowed on here (if its not ok I shall remove it) but this website from Philips has some very good comparable data for standard lamps to LED lamps which may help people to understand. http://www.lighting.philips.co.uk/pwc_li/gb_en/connect/tools_literature/MasterLED2011.pdf

Please note I do not work for Philips (I work as an independant lighting designer) and by no means am i saying go out and buy their product or what they are claiming is comparable to any other LED lamp. I just thought it may help

I would say what you pay for is what you get at the moment in the LED lighting field unfortuantly. If anyone has any questions I am more willing to try and help.

elstimpo

Mrs_Egg wrote: »

I haven't had a chance to read through everything that has been said on here but it does seem a lot of people are confused in regards to LED with regards to what levels you can achieve, prices, quality etc..

I don't know if posting links to various websites is allowed on here (if its not ok I shall remove it) but this website from Philips has some very good comparable data for standard lamps to LED lamps which may help people to understand. http://www.lighting.philips.co.uk/pwc_li/gb_en/connect/tools_literature/MasterLED2011.pdf

Please note I do not work for Philips (I work as an independant lighting designer) and by no means am i saying go out and buy their product or what they are claiming is comparable to any other LED lamp. I just thought it may help

I would say what you pay for is what you get at the moment in the LED lighting field unfortuantly. If anyone has any questions I am more willing to try and help.

My personal opinion is that for price to performance Phillips LED products are not good. However, i'd far rather fill my house with Phillips LED products than some of the cheap utter rubbish that has been touted on here. You'll save more money and energy, get a better quality of light, get a product that will last as long as it claims with a top priced LED product than you will from a cheap and nasty product.


Cheap and nasty LED's claim to do everything an expensive bulbs can do. This is simply not true.

I do agree, what you pay for you get. You pay a cheap price, you get a cheap product, in every sense.

fraser

so - what is the best GU10 50w replacement LED out there atm in terms of value for money?

shays_mum

Hi,

I am looking to buy 17 of the above, the cheapest i have found them is £11.98 inc vat & delivery.

Can anyone suggest anywhere cheaper, friends have companies that i could buy thru if i can get these cheaper?

Thanks in advance

Ok just need to post the best offer i had today after ringing around was from a lovely man called Rob @ http://www.eleconline.co.uk/zdriverel/form/product/M2775 £11 per bulb delivered!!!, also I have no 'interests' in the business before anyone asks!.

Dan_Iggulden

shays_mum wrote: »

Hi,

I am looking to buy 17 of the above, the cheapest i have found them is £11.98 inc vat & delivery.

Can anyone suggest anywhere cheaper, friends have companies that i could buy thru if i can get these cheaper?

Thanks in advance

Ok just need to post the best offer i had today after ringing around was from a lovely man called Rob @ http://www.eleconline.co.uk/zdriverel/form/product/M2775 £11 per bulb delivered!!!, also I have no 'interests' in the business before anyone asks!.

The Kosnic bulbs have a great write up and that seems on ok price for them.
The thing you need to consider with a LED bulb is whether you want a narrow spot light or a wide spread of light. If you want a narrow spot, then from what I read, the Kosnic are one of the better ones around. If you want a wide spread, there are plenty of bulbs on the market with a 90+ degree spread of light.
All depends what you want from your bulbs!

RosieBirkett

Hi there,

I am the Sales Manager for a Cheshire based LED lamp manufacturer and can tell you there are a lot of lamps in the market today that won't be in coming years.

There are 3 major components to an LED lamp that mean it'll work consistantly well and for its full life:
The chip, the heat sink and the driver.

If any of these is made to a poor standard the entire lamp is likely to be compromised. Unfortunately there are not yet any helpful UK standards to meet before distributing the lamps to market and, as a result, the UK is seeing a lot of poor quality products.

I just wanted to write that I'm happy to answer any questions about the market in general and offer tech advice upon request.