I like this channel. Smart dude talks about stuff... In detail.

I love your ability of turning a light emitting diode into a dark emitting diode.

7:30 "DED" = "dark emitting diode".

I legit thought the "small" one was a phone 😳

To quote Marvin "There was supposed to be an Earth-shattering kaboom!"

bigcobdotcom ?

Is that the "Big Dipper" I see in the dimmed LEDs? 😀

Clive, can you imitate a series parallel array with 1W LEDs to see how much the full power mismatch is? I'm curious to see if it balances out or gets worse. The more even illumination makes me think that it evens out at higher currents...

Imagine the whole ceiling with these

"Made in CHNA" - Where?

I can't wait for the inevitable goliath COB that is at least one square foot.

Who else wants to cover an entire ceiling with these and run them at low power so they don't get hot? That would look wild!

Current limiting it down to 1 or 1.5 amps it would still make a nice panel lamp for the back of a van (camper conversion). But as Clive says current limiting is vital.

I loved the drill torture test ! They are 600 leds on AliExpress COB sold as "400W(50w when 12v)" panels. I wonder if they are the same as they are more costly. They seems to be assembled by many shops on the same boards.

If my LEDs are not matched and I still want to wire them together in such numbers - is there a reasonable way to get it done without adjusting single LEDs?

I've been subbed for quite a while so how could I've missed this vid 🤔🙄?

With a good heatsink, and a fresnel lens, I bet that would make a awesome street light for ones property.

It needs some kind of diffuser to spread the light a bit more, it would make a good general backlighting unit :-).

It'd be fun if they did a mains voltage version, it'd make drilling that hole a lot more interesting, especially if the step-drill hit a live wire....... :D

It would actually be interesting to see that panel slapped across a fully-charged lead acid battery or a power supply of the same voltage. Make sure to collect all the magic smoke so you can put it back in, though.

Your camera didn't want to know about more accurate focusing, the cheat sheet was sharper before the refocusing. Is your camera disagreeing with your videos maybe? 🤭

6:40 oh yeah thanks for "focusing", that was very helpful.

You can also note how amazing the CRI is on the incumbent LEDs .. That's the main thing I noticed - everything going all haunted hospitally all of a sudden

I dig it, 6mm hole right in the middle, I thought you were gonna mount it someplace. Boy I was way off.

Still waiting for the smaller ones to arrive! Really tempted to buy this one, although I've no idea what to do with it / where to put it right now!

Thank you for using metric and imperial measurements!

Thank you for the video's I'm also an electrician and this kind of honest reviews are very helpful.

I would be interested to see what the current draw is if the weedy thin cables are replaced with big chunky ones - presumably it would then just be limited by the (thin?) tracks on the PCB. I'd also like to see what happens if it's suitably heat-sinked and run at 14.7v (i.e. 12v bulk charge voltage) for a while - does it pull 200W? Does it explode in a huge ball of plasma? Finally, say I do want to plug it into a battery - what's the best (cheapest/safest) way of limiting the current to something sensible?

Hahahaha I clicked in this video expecting to see LED experiments and ended up watching the best “LED ring” camera light idea ever hahaha ohhh yeaaahhh!!!

Be good to see how evenly the LED’s light under higher power than just lowest power. Also be good to see a spectral analysis for the sake of use in critical colour analysis such as textiles industry, film industry etc.

Sir, firstly, please share the product details and where it is available (in which site - amazon/ebay etc.). Secondly, is it possible and worth using this in commercial projects, especially industrial projects, from height ranging from 8 meters and above to achieve atleast 350 - 400 lux ? Also, let me know if possible what could be the life of these types of Big COBs on a 24 hour operational conditions ( yes, we will take into account proper current and voltage rating as per the specs provided and mounted on a Heat Sink calculated as per wattage). I appreciate your knowledge in this area and request your guidance and suggestion on this product and similar ones, reply will help us a lot. Thanks

Like always, you do a great review of products.

You were insinuating that these may be factory rejects, that is, somewhere else you can buy these with all beautifully matched LEDs at a much higher price, and you can run those at or near the 200W. But running LEDs well below their maximum design power is well worth it in terms of Lumen/W so surely, buying one of these could actually make economical sense, given the low £/LED.

watching this on an HDR monitor makes me want some goggles myself

holly crap...that's big...i've never saw such a big cob...

Clive ... interesting video . Perhaps it would be possible to access the individual sections and use a current regulator on each one . This would be a practical way to avoid the high cost of a prime quality unit . Also , would a polarizing filter on the lens help with the glare ? Edit : I see that smaller strip style units are available , perhaps these would be better for current regulator assemblies ... provided that the mismatch of the leds on each panel is not too great .

Omg ... I have to buy some of these! ... :). Lighting for my mobility scooter! ... pimp my ride!

Should we pass a hat around and buy Clive a decent lux meter? It would be interesting to know how close these things are to spec.

did you have to move it at 0:40 i was half way through counting the led's :)

With an appropriate case and low current, these would make excellent SAD lamps (seasonal affective disorder, ie. bright lights to keep your mood up). Only a simple diffuser needed.

2:00 if u squint it looks like space invader aliens

A interesting subject for a video would be lightning strike detectors they seem pretty interesting

Now come on Clive, that's not fair! You know how long shipping takes from China, the 70W one hasn't even arrived yet! Somewhat glad the larger one is poor, I'll put the 70W one on a heatsink with a DC/DC and makita battery holder so I have a mobile worklight.

I've got quite a few things from PanPan Supermarket. Not panels like this but I've been pleased thus far. I'll have to check them more closely now.

And people say "size doesn't matter"...

The focus was better BEFORE using the cheat sheet :)

I've just been waching this now. I noticed the panel has a clear "DC 12V" label on it. That would mean it would never run at 200Watts if you put only 12 Volts on it. It's an interesting panel though.

You can actually use that LED panel as a ring light, the issue is that the light needs to be diffused more, if you had a translucent plastic to send the light through, it might fix your glare issue.

Great video. I always enjoy videos from you keep at it !!

Is it me or is the very distinct patterns is the Grim Reaper or something similar like a walk sign sideways

16.66A at 12v to get 200w, that is an insane amount of juice for LEDs in general lol

LOL that hole you had drilled in that LED panel looked like there was some speck of dust on my screen.

Clive, when you said die LED, you reminded me of Goldfinger.

I wish you would put where to buy link in your description ! But good videos!

I need walls and ceilings like this.

damn clivey, your led's are an absolute unit

200 watt? I don't understand how you could dissipate that much heat through a static heatsink only, at least if you want any life from it. You would definitely need cooling fans with a heatsink.

You should take one of these outside at night and show us what its like at actually 200 watts. Assuming it survives long enough.

would make a cool 'computer' display for a scifi project, i know it would have to be seen in the dark and kept at low voltage but would look cool in a darkened room like a computer console in sleep mode ;) yeh my imagination is weird, thats me for ya x

Mount a clock module in the hole. Run it so it's glowing reasonably dimly.

If you scan the low voltage images of the panel with a QR code reader you get nothing.

Forgive my dumb question: how are you limiting the current? Are you driving with a PWM pulse? I thought that it wasn't possible to limit current and that's why they were doing PWM

Hope you are not going to plug it directly into the mains like the previous video you did using a smaller cob. It was funny when it went bang though!

How do you wire these? I have one from China and had no manual and I see 3 sets of +/- pads..

Still useful as a camera ring light for glossy objects if the bench and light were offset 10degrees?

One question: Could you pls give me the link for finding that big panel? Tried with the parameters you said on ebay with no luck.

Do you think I can use one of these for a small indoor around a half square meter ??

Clive, can you upload a short video of you running it at its full 200w for science??? :D Smokey!!!!

I wonder what these are actually manufactured for,never seen anything using anything this size or it’s smaller brother

What do you use to adjust the voltage? Ive got a 405nm laser id like to dial down to take a picture of.

i want to make a lightbox with a cutout logo in plywood infront of it. I want it to be very bright because i will have a color plexiglas 3mm between the glas and the cutout. which do you recommend? its a closed box 20x30cm and its closed so no aircooling 😁

Actually a common "12V" lead-acid car battery is slightly less than 14V without load, when in good shape and fully charged. If you pull 200W from it, the voltage will quickly drop, and the actual wattage through that cob connected to car battery will probably fall well below 100W within a few seconds as it needed 12.61V to pull 5.06 amps.

I think I need to get one of these to experiment with

i love waching these videos wen u take apart stuff and see how it woks keep going on with the vids!!!! :-)

There is even bigger LED COB. For example 500W and 1kW but they are really expensive.

Have you seen the driverless 150w version? There is also a 150w version of this that is actually "3 cobs in a cob", each 50w cob with its own pads.

Looks like they may be fairy efficient at lower power levels too, eg through a dc-dc converter with current limiter. I hope my 200w 240v cob has matched leds (yet to be tested) thanks for the geat info once again!

I have the 300watt cob led under test .9 months 24/7 on with 13 volt dc and still going

That's big enough to melt my face! It's just ridiculous!

How do you cool the 1st one? What type of heatsink can you use?

Hey man I'm looking to buy some leds to make a diy board and the information on the leds is just numbers and letters to me I really need to know what kind they are and if I can use them for a grow light

Hey Clive... I don't see a link in the description. Just curious about this cob

No mounting holes for heatsink.

We like lights that can be used to grow naughty flowers. It seems odd that a power supply is not "on board" by the addition of a few extra surface mounted components.

Hi Clive. I have a question that I should realy know the answer to. I wish to make a PCB for an IR Torch, it will have 100 X IR LED's aranged in rows of 10. It will run off a 5V power bank The kind you get to charge a phone. The spec's of each IR LED are, Forward Voltage 1.3v, Forwards Current 50ma. The problem I am having in my brain is, what is the best way given the above details of aranging the LED's on the PCB? PARALELL or SERIES? Many thanks pal.

I don't really have a use for one of these but is so want one!

for 200w cob led is the wire too small on these led panel?

You answered many questions nobody asked, but- why did the photo you used for the reflectivity demonstration look like you'd photographed a circuit board through bubble wrap?

Exactly how would one mount this to a heatsink? All the mounting holes are on one side...

Clive, would it be possible to use some of those varible resistor ICs found in 240v LED modules to limit over voltages and then power theses things from a car?

Who sold this? I want to get one.

Hello, have you tried put them all leds in series and put under the sunlight to see how many volts you get? Tip: RPP Nigel Cheese technology

I want to put something like these in old Mole Richardson 1K light fixtures. Zip/Softlights. Why can’t LED’s make that happen yet?!

the cheat sheet actually defocused it it was focused perfectly already

Do all LED manufacturers have to match chips on their LED panels or just the cheap ones? I would think that good process- and quality control would eliminate the need for high-end manufacturers to match their chips.

There are filters photographers use to eliminate glare and reflections.. it’s not an ND filter or if filter but I believe a polarizing filter.. you just rotate them until it blocks the light you want eliminated and is used in shooting cars or water or really anything shiney and would be perfect when used in conjunction with your ring light here!!! Awesome stuff and new sub!

Ended an interesting object Thanks for sharing 😀👍

Well, now I know that I can make a hole to screw a heat sink. LMAO!

Can you run a led strip on 230V with resistors?

the big panels still give softer shadows than smaller sources