Jos valaistusjärjestelmässä on satoja ledejä, kaksikin prosenttia merkitsee isoa säästöä. Luxeon-sarjan uutuudet ovat 3030 HE- (valaistus) ja SunPlus 3030 -komponentit (kasvihuoneet). Niiden värilämpötila kattaa alueen 2200 – 6500 kelviniä ja CRI-värintoistoindeksit ovat 70, 80 ja 90.

If I thought the COB LED panel was big the last time, then this is now officially the biggest I’ve ever seen. It’s based on a solid panel of aluminium with a PCB layer laminated on. The COB aspect (Chips On Board) indicates the way the bare LED chips are bonded directly to the PCB layer and bond wires attached between the chip contacts and the PCB.

I’m not sure how I missed this. It’s possibly because it’s a secret that has been hiding underneath a phosphor loaded gel out of sight.
Could this be the answer to the bond-wire problems in the early low voltage 20-100W LED modules? It’s a new package of bare LED dice/chip that can literally be soldered onto a PCB as if it was a standard surface mount component. Just a very-very small one.

The contact block on the PCB which was clearly not bear-proof looks more like a push-in style for solid core wires. My attempt to treat it like a Wago terminal and “open the spring loaded contacts” just forced the folded contact strip apart and broke the little tab that is just a wedge that is supposed to part the sides just enough to get a wire back out again.

Manufacturing process of LED chips.

Testing a mains voltage LED from China. This one is rated 220V and 20W. It really can be connected directly to AC mains with no LED driver. 30W and 50W versions are also available. In the listings it’s called “smart IC” or “integrated driver” or “driverless” COB LED.

Testing a mains voltage LED from China. This one is rated 220V and 20W. It really can be connected directly to AC mains with no LED driver. 30W and 50W versions are also available. In the listings it’s called “smart IC” or “integrated driver” or “driverless” COB LED.

COB LED systems are actually quite simple – there are only a handful of different parts, and they all go together pretty easily. The main components of a COB LED system are:

The COB LEDs themselves
Heat sinks that the COBs are mounted to
LED drivers that power the COBs
The wires that interconnect the COBs and drivers.

Not so bad, right? Let’s delve a little further in.

This is based on a fluorescent tube light that is not quite bright enough, but super handy. The end result was ridiculously bright and overheats after about 15 minutes.

3D here: https://grabcad.com/library/110v-cob-led-tube-light-1