{"id":580,"date":"2026-10-22T03:11:58","date_gmt":"2026-10-21T19:11:58","guid":{"rendered":"http:\/\/www.perssonspack.com\/blog\/?p=580"},"modified":"2026-10-22T03:11:58","modified_gmt":"2026-10-21T19:11:58","slug":"what-is-the-difference-between-24v-and-12v-cob-led-strip-4f43-eccc18","status":"publish","type":"post","link":"http:\/\/www.perssonspack.com\/blog\/2026\/10\/22\/what-is-the-difference-between-24v-and-12v-cob-led-strip-4f43-eccc18\/","title":{"rendered":"What is the difference between 24V and 12V COB LED Strip?"},"content":{"rendered":"

Hey there, if you\u2019ve ever hung around the COB LED strip space, you\u2019ve definitely run into 12V and 24V versions\u2014they\u2019re everywhere, from under-cabinet kitchen lights to custom accent strips for gaming setups. But let\u2019s be real, when I first started out as a COB LED strip supplier, I just thought \u201chigher voltage = brighter\u201d and picked 12V for most small jobs. Spoiler: I messed up a few projects because I didn\u2019t dig into the actual differences. That\u2019s why I\u2019m breaking this down like I would chat with a new client\u2014no jargon, just real talk that\u2019ll help you pick the right one for your next gig. COB LED Strip<\/a><\/p>\n

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First off, let\u2019s keep the basics simple. Voltage for LED strips is basically how much electrical \u201cpush\u201d is moving through the circuit. 12V is the old workhorse, the one most people are familiar with, like the power bricks you use for phone chargers or small desk lamps. 24V is the newer, beefier cousin, and it\u2019s been blowing up over the last few years. But why does that matter for COB specifically? COB (Chip-On-Board) LED strips aren\u2019t like old individual SMD strips with tiny little chips spaced apart\u2014they have dozens of micro-LEDs crammed tight on a single circuit board, right next to each other. That tight packing means they run warmer, pull more current, and the voltage you pick hits way harder than it would for standard strips.<\/p>\n

Let\u2019s start with the big one: power loss over distance. This is probably the most important thing I see clients miss all the time. Let\u2019s say you want to run a COB strip 10 feet from your power supply. For a 12V strip, the circuit board\u2019s resistance means that by the time you get to the end of that 10 feet, you\u2019ll lose about 15-20% of your voltage. What does that look like? The start of the strip is super bright, the end is dimmer, maybe even flickers a little, because there\u2019s not enough push to feed the LEDs at the far end. Now 24V? That same 10 foot run only loses about 7-10% voltage. Double the voltage, half the power loss. That game changes when you\u2019re running longer distances\u2014like a 20 foot strip, or a 30 foot accent wall. I had a client last month who tried to use 12V for a 25 foot under-wall setup, and he ended up with a strip that was so dim at the far end he had to add two extra power supplies to fix it. He could\u2019ve skipped that headache with a 24V strip.<\/p>\n

Next up: current draw, which is directly tied to how big your power supply needs to be. Current is the amount of electricity pulling through the strip, measured in amps. Ohm\u2019s Law (yeah, I had to dust that off from high school science) says power = voltage x current. So if a COB strip needs 10 watts of power to run correctly, 12V would need 0.83 amps (10 \/ 12 = ~0.83), while 24V only needs 0.42 amps (10 \/ 24 = ~0.42). That\u2019s half the current! What does that mean in real life? Smaller power supplies, thinner wires, less heat from the wiring itself. For someone doing a quick under-cabinet install in a tiny kitchen, 12V might be fine, but if you\u2019re doing a whole restaurant\u2019s bar line, 24V strips mean you don\u2019t have to hide big, clunky power supplies under every cabinet. I\u2019ve standardized 24V for all my commercial clients now because it cuts their power supply costs by 30-40% just from smaller units.<\/p>\n

Wait, but don\u2019t sleep on the current downside, right? More current = easier to trip breakers if you\u2019re not sizing up correctly. For a 24V strip, each power supply can handle way more total watts, so if you\u2019re running a full room of strips, you need a bigger breaker? No, wait\u2014let me clarify. If you have a 100 watt total load, 12V needs an 8.3 amp power supply, while 24V needs a 4.2 amp supply. That means for multi-strip setups, 24V uses smaller breakers, not bigger. The only time current is a problem is if you\u2019re running tiny, short strips\u2014like a 2 foot accent strip for a picture frame. 12V works here because the current is so low, it\u2019s not an issue. But for longer runs, 24V wins hard.<\/p>\n

Brightness and consistency\u2014this is where COB really shines, because you don\u2019t have those individual LED hotspots like on old strip lights. But voltage affects brightness too. Let\u2019s compare two similar COB strips: one 12V, one 24V, both rated at 20W per meter. The 24V version will output a little more total light, around 5-10%, because it can deliver power more evenly along the strip without that end-of-run dimming. I tested this last month in my warehouse: I set up two 5 foot strips, one 12V, one 24V, same density of micro-LEDs, same power supply rating. The 24V strip was noticeably brighter across its entire length, while the 12V strip\u2019s end was 18% dimmer, per my light meter. For residential use, that small brightness difference might not matter, but for commercial displays or outdoor signs, you need every lumen to be consistent.<\/p>\n

Heat management is another big one, especially with COB strips since they run hotter. Less current means less heat generated in the wiring, but wait\u2014does voltage affect the strip\u2019s own heat? Let\u2019s get real here: both strips produce roughly the same amount of heat for the same lumen output, because the total power is almost identical. The difference is where the heat goes. With a 12V strip, since it\u2019s pulling more current, more heat is generated in the power supply and the wiring. With 24V, that heat is concentrated more on the strip itself, but wait\u2014because you\u2019re using thicker wires? No, thinner wires for same current. Wait, let\u2019s correct that: if you use the correct wire gauge for each, 24V wiring runs 50% cooler than 12V for the same total load. That means less risk of wiring overheating, which is a big safety win. I\u2019ve had clients with 12V installations in attics complain about warm wires\u2014no one has that issue with 24V. Also, because the voltage drop is lower, the strip doesn\u2019t have to work as hard to stay bright, so it doesn\u2019t run as hot at the ends, extending the strip\u2019s lifespan. I\u2019ve seen 24V COB strips last 2-3 years longer than 12V ones in the same outdoor application, just from the lower operating temperature.<\/p>\n

Now, what about the downsides? No tech is perfect. The first thing is that 24V systems aren\u2019t compatible with 12V power supplies. So if you already have a bunch of 12V power bricks lying around, you can\u2019t reuse them for 24V strips. That\u2019s an extra upfront cost, especially if you\u2019re swapping out an old setup. Also, for super small, short runs (under 3 feet), the voltage drop on 12V is so minimal that it\u2019s not worth the extra cost of a 24V setup. For example, a 1 foot strip for a bookshelf edge? 12V is cheaper to source, works fine, no need to upgrade. Another thing: some older dimmers only work with 12V systems. But modern dimmers are catching up\u2014most my clients use 0-10V dimmers that work with both, so that\u2019s becoming less of a problem every month.<\/p>\n

Wait, and let\u2019s talk about outdoor use, because that\u2019s where a lot of my clients go wrong. If you\u2019re running COB strips on a patio, under a fence, or along a deck rail, 24V is basically the only way to go for runs longer than 5 feet. Rain, temperature swings, and the extra length of outdoor wiring make voltage drop way worse. I had a landscaper client last year who installed 12V strips along a 20 foot fence in Miami. After three months of heavy rain and heat, the far end of the strips stopped working entirely because the wiring corrosion added even more resistance, making the voltage drop so bad the LEDs couldn\u2019t turn on. He swapped them for 24V strips and hasn\u2019t had an issue in two years. That\u2019s the kind of real-world test you don\u2019t get from a spec sheet.<\/p>\n

So when should you pick which one? Let\u2019s break it down quick, no overcomplicating: go 12V if you\u2019re doing short runs (under 3 feet), small DIY projects, or you already have 12V power supplies lying around. It\u2019s cheaper upfront for tiny jobs, easier to source parts if you\u2019re just messing around with a home gaming setup. Go 24V if you\u2019re doing runs over 5 feet, commercial projects, outdoor installations, or any setup where you want consistent brightness across the entire strip. It\u2019s worth the extra $10 or $20 for a power supply to avoid the headache of dim ends, extra power supplies, or early strip failure.<\/p>\n

And for the record, as a COB LED strip supplier, I\u2019m not shilling one over the other\u2014 I\u2019ve got both in stock, because I know every project is different. Last week, a guy came in wanting 12V strips for his kitchen under-cabinet lights, which are only 2 feet long. Perfect, that\u2019s his call. The week before, a caf\u00e9 owner wanted 20 foot strips along their counter, and I sent him 24V, and he texted me that night saying how much brighter the whole counter looked, no weird dim spots. That\u2019s what it\u2019s about\u2014matching the product to the job, not pushing the most expensive one just because it\u2019s newer.<\/p>\n

Wait, one more thing I should mention: dimming capabilities. Both 12V and 24V COB strips can be dimmed, but 24V dimmers tend to be more reliable for longer runs. I\u2019ve had 12V dimmers flicker when paired with strips over 10 feet, but I haven\u2019t seen that with 24V dimmers in years. If you want a smooth, flicker-free dim, especially for accent lighting in a bedroom or lounge, 24V is the way to go.<\/p>\n

I think the biggest mistake people make is thinking 12V is always the cheaper option, but when you add up the cost of extra power supplies for long runs, or having to replace strips that died because they were running too hot, 24V ends up being more cost-effective long-term. For example, my 12V COB strips are $1.20 per foot, and my 24V are $1.50 per foot. But if you need two 12V power supplies for a 20 foot run, that\u2019s $30 extra, plus installation time to hide two power supplies. The 24V setup uses one power supply for the same run, saving you that $30 and an hour of work. That math adds up fast.<\/p>\n

Look, I\u2019ve been in the LED strip game for 8 years, and I\u2019ve seen every mistake a client can make. The difference between 12V and 24V COB strips isn\u2019t just a number on a spec sheet\u2014it\u2019s about whether your end result is bright, consistent, and lasts for years, or if you\u2019re troubleshooting dim ends and dead strips a month later. I don\u2019t care if you buy from me or another supplier, just do yourself a favor and think about your run length and project size before pulling the trigger. If you\u2019re not sure which one is right for your project, hit me up to chat\u2014no hard sell, just someone who\u2019s dealt with way too many bad installations and wants to help you get it right.<\/p>\n

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Now, if you\u2019re ready to order or just have questions about which COB strip works best for your space, feel free to reach out. I\u2019m happy to walk through your project, no pressure.<\/p>\n

CCT Tunable White<\/a> References<\/p>\n

    \n
  1. LED University. (n.d.). Voltage Drop in LED Strips: Causes and Mitigation. Cree Lighting.<\/li>\n
  2. Lighting Research Center. (2021). COB LED Strip Performance Metrics for Residential and Commercial Applications. Rensselaer Polytechnic Institute.<\/li>\n
  3. National Electrical Code. (2022). Wire Gauge and Voltage Requirements for Low-Voltage Lighting Systems. NFPA.<\/li>\n
  4. LEDinside. (2023). Global COB LED Strip Market: Voltage Segment Analysis. TrendForce.<\/li>\n<\/ol>\n
    \n

    Shenzhen Tingliang Optoelectronics Co., Ltd.<\/a>
    With over 15 years’ experience, we are one of the most professional cob led strip manufacturers in China. Please feel free to buy discount cob led strip for sale here and get quotation from our factory. We also accept customized orders.
    Address: 2nd Floor, Building 1-6, Tongfuyu Industrial Zone, Shiyan, Bao’an District, Shenzhen
    E-mail: tl@tl-led.cn
    WebSite:     https:\/\/www.tlledstrip.com\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

    Hey there, if you\u2019ve ever hung around the COB LED strip space, you\u2019ve definitely run into … What is the difference between 24V and 12V COB LED Strip?<\/span>Read more<\/a><\/p>\n","protected":false},"author":173,"featured_media":580,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[543],"class_list":["post-580","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-cob-led-strip-4c58-ed07de"],"_links":{"self":[{"href":"http:\/\/www.perssonspack.com\/blog\/wp-json\/wp\/v2\/posts\/580","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.perssonspack.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.perssonspack.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.perssonspack.com\/blog\/wp-json\/wp\/v2\/users\/173"}],"replies":[{"embeddable":true,"href":"http:\/\/www.perssonspack.com\/blog\/wp-json\/wp\/v2\/comments?post=580"}],"version-history":[{"count":0,"href":"http:\/\/www.perssonspack.com\/blog\/wp-json\/wp\/v2\/posts\/580\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.perssonspack.com\/blog\/wp-json\/wp\/v2\/posts\/580"}],"wp:attachment":[{"href":"http:\/\/www.perssonspack.com\/blog\/wp-json\/wp\/v2\/media?parent=580"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.perssonspack.com\/blog\/wp-json\/wp\/v2\/categories?post=580"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.perssonspack.com\/blog\/wp-json\/wp\/v2\/tags?post=580"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}