I've been keeping an eye on this "COB LED" technology for a while now and I eventually got around to buying some samples to test. The price has come down dramatically on these over the last couple of years. This one was around €2 delivered.
While some of these panels are 7000 lumen, 70w (and bigger), I chose a more compact 1000 lumen, 10w panel for my needs. I'm pretty sure this 12cm x 4cm panel will fit neatly inside in my original outdoor "patio lamp" with a little modification to the existing bulb holder. I'm expecting about twice the amount of light than the standard 25w filament bulb and it'll use less than half the power.
First impressions were very good. A huge amount of light from the panel and just under 0.8 amp @ 12vDC.
Since changing jobs, I no longer have easy access to a light meter to check the lumen output, but it did a good job lighting up my workbench lastnight!
The quality on these can be a bit touch and go apparently, but the one I received had only 2 dead diodes (of 112 per panel) which based on reviews, seems to be fairly standard. But you don't notice the dead leds unless you're looking at it through a welders face mask.
It arrived on Monday and I'll leave it running 24/7 on bench-test for a while just to see how it behaves, but for now I'm pretty impressed. I'll update with pics and more info later.
As usual i went with warm white to try to keep the same light colour as standard filament bulbs. Although you can get them in cool white too if that takes your fancy.
The only thing I've noticed so far is it generates quite a bit of heat (not surprising). So if it's not heat-sinked to a piece of metal or cooled sufficiently, I'd suspect life-expectancy might be a bit questionable. I have it sitting on a 1" lump of aluminium plate for testing at the moment.
Example:
https://www.ebay.ie/itm/1000LM…KDytx--_HQ
While some of these panels are 7000 lumen, 70w (and bigger), I chose a more compact 1000 lumen, 10w panel for my needs. I'm pretty sure this 12cm x 4cm panel will fit neatly inside in my original outdoor "patio lamp" with a little modification to the existing bulb holder. I'm expecting about twice the amount of light than the standard 25w filament bulb and it'll use less than half the power.
First impressions were very good. A huge amount of light from the panel and just under 0.8 amp @ 12vDC.
Since changing jobs, I no longer have easy access to a light meter to check the lumen output, but it did a good job lighting up my workbench lastnight!
The quality on these can be a bit touch and go apparently, but the one I received had only 2 dead diodes (of 112 per panel) which based on reviews, seems to be fairly standard. But you don't notice the dead leds unless you're looking at it through a welders face mask.
It arrived on Monday and I'll leave it running 24/7 on bench-test for a while just to see how it behaves, but for now I'm pretty impressed. I'll update with pics and more info later.
As usual i went with warm white to try to keep the same light colour as standard filament bulbs. Although you can get them in cool white too if that takes your fancy.
The only thing I've noticed so far is it generates quite a bit of heat (not surprising). So if it's not heat-sinked to a piece of metal or cooled sufficiently, I'd suspect life-expectancy might be a bit questionable. I have it sitting on a 1" lump of aluminium plate for testing at the moment.
Example:
https://www.ebay.ie/itm/1000LM…KDytx--_HQ