curiousity about some smd-part on a LED-bulb

Hello men,
can somebody tell me what this is? I just discovered this on a 13w 3000k-LED bulb for E27 socket that i used for clones. Pretty much standard household. It looks to me like some kind of reading points? but for what? This is a 220v bulb that costs less than 3eu?

edit: besides, you cant even reach it usually. I took the diffuser off.

I would think it's a test point as well. It may also work as a DC input.
I definitely looks like a 3Eu board, I bet some 12 year old made it in the break room toaster.

why would you make a reading point in a cheap bulb that you cant even reach anymore when the diffuser is glued in? And what would be a usecase? Quality control? In a 2,49eu product?


would be funny if you could just hook a battery in there. And maybe even get better efficiency with less current. You can build a serious growlight with these, you reach 1,8 usable PPFD, thats just a notch under average efficient lights like Vipar Spectra or Mars hydro. Migro did that once...just that his Phillips cost 10eu each and still it was a "superbudget-diy" lol...this costs 2,49eu and has same wattage and also 1521 lumens. 25eu for a 130w growlight yeehaa.

R1 and R2 are surface mount resistors.

yes and in the left upper corner theres a Phillips screw, thank you
Dude were very obviously speculating about that 2 metal dildos and not that boring black boxes XD

mannitu77 said:

yes and in the left upper corner theres a Phillips screw, thank you
Dude were very obviously speculating about that 2 metal dildos and not that boring black boxes XD

Click to expand...

Don't touch them or you'll get a shock.

My guess is a machine makes the bulbs, then tests that all the diodes light up by sending voltage through those 2 prongs. As long as they all light up they put the diffuser on them, and into boxes. Just a guess though.

These are ment as bug-zappers

i think its emergency, so you can hook battery if poweroutage in your region.

nah i think machine test is probably close. just additional points of the existing poles, also 220v?

They are probably test points to verify a voltage or resistance during manufacturing.

its the power supply to the pcb from below.

It's the driver output

guys i think its even 2 of this things. What do you think about that Philips 6500k bulb? its got less than half the diodes, but same data. 1521 lumen at 13 watt. I guess nobody can say what diodes these are? Does look far cheaper to me than the 2,49eu bulb. Costs 4eu now i think but it was more expensive in earlier days.

the 6500k SPD has alot of green thus should register higher into the luminosity, so they may have needed less diodes/output to arrive at the same perceived brightness. If that is true the more redshifted ones are better

These are surface mount connecters to either insert a board (post #11) or attach large through hole capacitors (those with the pins at the bottom).

It makes assembly much easier than traditional through hole technolgy. That had to be assembled by hand and then soldered. Suface mount technology (SMT) is completely automated.

I snip them off as low as the nippers will go, careful not to break the connection, then cover with blobs of high temp RTV silicone to insulate from shock hazards.