So Many MISERABLY FAILED LED Lights

hi you know me i always encourage people to save energy i encourage them to for example buy led lights but then there are manufacturers that make products that don't last as long as they advertise led lights are expensive so when they don't last as long as they shoot it pisses me off and that's not all look at these here i have 20 led light bulbs all dead they are supposed to be for exterior use but look at this some of them are filled with water how did the water even get in there if designers knew how to make things to last for a specific application we wouldn't be in this situation that's why i picked kirikou to sponsor my video to help teaching kids early to be creative tinker and learn with hands-on projects every month i've got these crates for my daughter to put together see they come in pieces that you would have to build using the easy instructions provided and learn how they work you can also get 50 off of your first month of any crate at kiriko.com electro boom let's pass them to her here you go oh nice let's see let's do the pencil sharpener one first [Music] okay good luck i bought six of these and three of them were already dead they were supposed to last for 10 000 hours but all of them died within six months or around 600 hours of use these small ones though they are part of one of those cheap string lights that go around your garden they don't have any rating i bought them from amazon so i didn't really expect much from them but still led lights and they all died within a few months you think these are not dead and i'm lying to you let me turn them on for you we just need to be careful with loose how do i turn them on oh i know i found one of these light sockets with some wire and connected it to my main wire let's turn it on wow a little bit of electric tape goes a long way so there we go hey look at this led turns on a little bit so it's half that maybe the led strings are not dead how about the small one the one that's soaking in water now this is definitely dead another small one dead yet dead it seems most of the small ones have a little bit of water in them and probably that's what killed them so much for exterior lighting but these are not some no-name cheap brands at home i use a couple of different brands and none of them have died except for this one except just to be fair only these ones are 40 watt equivalent the rest are 60 or 100 watt equivalent and you would expect the 41 to last longer but no now what do i do with these i spend a ton of money buying these and i can't even return them after all this time can i return them 3 year warranty 5 year warranty and these ones have 10 years warranty i didn't know that so i can replace them for free no then i can't really be mad at them although it's an inconvenience to go and exchange it for a new one but hey so please don't be discouraged from using led lights just go with brands that give you warranty so you can replace them unlike that cheap no-name amazon stuff that goes straight into the garbage and learn how to use the warranty too i don't know how that works but in any case it is worth it to pay a little bit extra money to get a good quality light that lasts long and saves a ton of energy keep telling yourself these lights use one tenth of the power the incandescent lights use anyway to me it sounds like a design issue let's see if we can figure out what's wrong with this so manufacturers can improve their quality now how do we get in there let me use my trusty battery glass everywhere should i put it in a plastic bag [Applause] you see this led light has only two strings in series and whatever drives them is in this tiny light screw thing let's cut the light screw thing open and see what's inside look at the tiny circuit i thought there would be some switching going on but there is no inductor let's see if i can figure out what's going on here well this is an interesting tiny circuit basically the ac first goes into a full bridge rectifier gets rectified and powers the chip and the leds this chip is an obsolete chinese chip with chinese data sheet but from what i understand it's basically a current regulator that limits the current through the leds using an external resistor to 33 milliamps from what i understand from the data sheet this circuit should be well within its operating limits so it shouldn't be broken let's test the leds so here i'm creating 60 volts on the bottom power supply and i also added another 30 volt on top so i have like 90 volt total which means if i put it on my tongue i'll probably have nightmares for ages but on my fingers i don't feel oh if i push it hard enough i feel it a little bit yeah i'm getting distracted anyway i currently limited my dc 90 volt to 33 milliamps and you can see that one of the strings turns on very dim while the other one turns on at full brightness so one of the strings here is broken and because the two strings are in series one of them broken doesn't let the other one turn onto so the result agrees with me that the led strings are broken not the driver see this one is another 40 watt equivalent led light from philips that from what i see is using identical led strings but instead of two is using four strings to get the same brightness and it seems like they went with a much larger driver circuit i expect this one not to die anytime soon but we went with this one because well obviously it looks much better now in led lights the driver circuit typically dies earlier before the led strings because the components get hot and fail earlier that's why they typically go with larger pcbs and bigger metal pieces to dissipate heat better it makes the led light a little bit uglier but at least they can meet the lifetime they are putting on their packaging well these guys didn't put much to dissipate the driver's heat but to make sure it doesn't fail first they use half the number of led strings big clive has a great video that talks about how in dubai they forced phillips to use even more led strings and how that's beneficial but basically in that brand i had that had two led strings that consumes four watts you have to run 33 milliamps through both led strings but for example in other 40 watt equivalent brands that use four led strings not only you don't need as high current to get the same brightness and so you use less power but also only 14 milliamps runs through the led strings which means less stress on the components and much longer life span so if you come across led lights that ship out like this make sure they come with good warranty or maybe a new technology that can handle that much power i recommend led light bulbs and these guys make me look bad speaking of light bulbs let's see what's inside this garbage [Music] look at this something else just a resistor or series with an led string let's turn it on well this led light was functional but i don't know why i can't turn the led string on with my 90 volt power supply so let's just plug it straight into the 100 please just don't touch come on little sh just stay apart now we can just probe across the resistor and understand the behavior and because the probe ground must connect to neutral or earth we better we better turn off the circuit and swap the live and neutral connections and this is what it looks like these are like 50 volt peak across the resistor that is 5 kilo ohm so means 10 milliamp through the led string in both directions the circuit is just this a resistor and led and it seems like across the resistor we have 50 volt peak which means 120 volt falls across this puny led in both directions sounds like it's a special string because not only there should be two sets of leds reversely connected so that the current can go both ways but also every white led has three to four volt across it when it's on so in order to have 120 volts across it there should either be 40 leds in series or some internal series resistance unfortunately these are all some mystery chinese components and i will probably not be able to find any documentation on them let's see what's wrong with the broken ones there you go as suspected the series 5k resistor is blown open so maybe if i replace it with another 5k it works and well this well it means the led strings in all of these should be fine so i should be able to harvest them and maybe use them later and the reason resistor dies is because water gets into the light bulb and shorts between these two points extra current runs through the resistor and it blows up so much for the exterior light bulbs and it's such a bad inefficient cheap design too to control the led current with series resistors i mean it's bad for led light bulbs for single leds on boards it's fine the water can also short across the resistor which forces more current through the led it shines brighter and can die over time so the moral of the story is write bad reviews for low quality light bulbs that die quickly to send a message to the manufacturer and it is okay to spend a little bit more money to get quality light bulbs so they don't die quickly and you reduce waste and make sure to use your warranty so manufacturer knows they made a product and you won't lose money and more importantly keep using led light bulbs to save energy and most importantly teach your kids to make and innovate thanks to my sponsor kirikou hey are you done yeah wow does it actually work of course it does see i love the fact that it's actually useful it looks complex the instructions are easy i like this they actually provided a bunch of science and knowledge at the end too here we go has eight subscription lines catered to different age groups every month your child will get a fun and engaging project or toy to feel their time and brain and get exposed to the concepts in steam and of course my viewers get 50 off of the first month of any crate at kiwico.com electro boom also linked in the description because this is how smart innovators makers or engineers are made from a young age by gaining hands-on experience doing smaller fun projects suitable for their age which can lead into world-changing ideas tomorrow this is what i always say keep making your child experience different things not only they'll learn a ton but also they may suddenly click with one of the concepts that may define their path for the future like when i put my first electronic kit together when i was just a wee lad and that's what exactly kiwico does with the variety of projects and toys so make sure to check them out and thanks for watching

Channel: ElectroBOOM

Views: 1,844,272

Keywords: educational, electrical, ElectroBOOM, science, electronics, engineering, entertainment, equipment, measurement, experiment, mehdi, mehdi sadaghdar, arc, mishap, physics, Sadaghdar, test, tools, circuit, funny, learn, shock, spark, discharge, LED Light, light bulb, life time, failure, driver, led string, short life span

Id: lIK1jnYr0yw

Length: 12min 6sec (726 seconds)

Published: Fri Mar 19 2021