Everything You Would Like to Know About COB led Strips-From Factory

This guide is all about COB led strip. You'll learn everything you need to know before buying one and how to effectively use this strip for maximum benefits.

Article Guide

    What is COB?

    Lightstec is a professional COB led strip light manufacturer. Here will tell you something about COB strip lights.

    COB stands for Chip on Board in the LED field, which basically means that the LED chip is packaged directly on the circuit board (PCB). “Chip on Board” LEDs for flexible strip lights are sometimes referred to as flip-chips.

    Flip chip LEDs are basically a bare-bones approach to LED construction. Take a look at an ordinary SMD (Surface Mount Device) LED. It has a Lamp bead holder that package the LED chip and then covers it with a phosphor coating. The ‘flip chip’ that makes up the COB LED strip removes everything from its design, except for the LED chip, yellow phosphor cover layer, and connection pads.

    SMD-LED chips
    COB-led chips

    How is the COB LED flexible strip manufactured?

    Let’s have a look at the main process of making COB LED strip lights in Lightstec.

    1. Expanding Chips
    2. Die bonding
    3. Resistors onto FPCB
    4. Reflow-High temperature over 65 degrees for finished PCB with chips and resistors
    5. Fluorescent Powder glue mixing
    6. Drop the mixing glue on the surface of chips and resistors by auto glue machine
    7. Put glued cob led strip into the oven
    8. QC-testing the cob led strip after cooling
    9. Soldering the PCB into 5 meters per reel or the length as the customer requests
    10. Aging test, QC test, packing, then shipping

    Advantages and Disadvantages of COB LED Flex Strips

    If you have been looking for a new solution for your indoor grow room, COB led strip is the best option nowadays. This new technology has enormous advantages over traditional bulbs. But before making a decision, you should know its advantages and disadvantages.


    No LED lighting dot, even without aluminum profiles.

    One of the biggest complaints about traditional LED strips is the lighting dot throughout the strip. A lighting dot is a bright area through the strip where you can see where the light is coming from. Light is more soft and attractive when it looks like a smooth light source rather than a lighting dot mess.

    With 5050 SMD flex strips, the larger diodes are squeezed close enough so that the light is spread out and consistent across the illuminated surface at a distance. But if the light is too close to the surface or the strip itself is visible, the hot spot is an obstacle that the human eye cannot ignore.

    With a 480 chip/M COB strip, it is pretty challenging to pick out any hot spots on the COB flex strip. This strip shines a soft, uniform light from end to end. Even light with no lighting dot is more attractive to the human eye and gives off a steady light even in the narrow places. The only natural way to see the lighting dot is to look at the back of the strip, where it is easier to see the individually placed flip-chip LEDs. You can only see the individual led if you dim strip down to about 5% brightness. This makes COB flex strips ideal for applications where

    1. The led strip itself cannot be hidden from view.
    2. The surface being illuminated is within 2 feet of the light bar.
    3. Reflective surfaces like granite/glass are all around.
    4. Those applications where you want an excellent neon effect.

    More flexibility

    These strips are much more flexible than other flexible strips because of the small size of the diodes and the uniform weight distribution. These diodes are so small and closely spaced that no point of the strip is the same. This uniformity makes it easy to set up the strips without planning around a 5050 SMD LED sticking out where you don’t need it. This extra flexibility will make it easier for them to fit into tight areas and turn corners in your application.


    More stable, fewer problems

    1. COB strip is the chip directly attached to the FPCB, and does not come with gold wire. In Traditional SMD LED strips, very many problems are caused by the gold wire inside the LED beads. Because the gold wire is too small, it is straightforward to be broken, leading to the chip not being illuminated.

    2. The circuit design of the COB strip uses three chips, first in parallel, as a group, then in each group, and then in series to form one step. Even if a group of two chips inside the bad, this one-step strip can continue to light. And COB a meter of chips how big 480, even if 1-2 chips do not light, will not produce dark areas, will not affect the use. While the traditional SMD strip, is a CUT, as long as there are lousy lamp beads, this one cut will not light, so there will be obvious to see a section of the dark area.


    Wide emitting angle

    The traditional SMD light strip luminous angle is 120 degrees, while the COB light strip luminous angle is 180 degrees.


    Because COB LED strips, chip on board, do not have the gold wires of traditional SMD LEDs, so they will not be vulcanized. In the chip inside the SMD LED lamp bead, one electrode is connected to the LED bracket with gold wire, and the other electrode is connected to the bracket through silver glue. But silver reacts very easily with sulfides to form silver sulfide. As a result, the blackening and luminous flux of the LED are reduced.

    Stronger anti-static capability

    COB LED strips to have stronger antistatic ability than traditional SMD LED strips.

    COB Strip Disadvantage:

    Difficult to maintain the consistency of color

    Because there is no COB led strips binning machines on the market. At present, all COB-led strip manufacturers are only sampling to ensure color consistency. So, COB led strips are difficult to ensure that 100% are within the 3-step color tolerance.

    Lower luminous efficiency

    COB led strip light efficiency, is currently only about 120LM/W. If you need higher light efficiency, COB led strip is not suitable.

    Lower power

    The maximum power of the COB led strip is only recommended doing 15W / m. Because the number of chips per meter is too much, if the power exceeds 15W / m, the chip’s heat is brutal to dissipate. COB led strip life will be shortened.

    Characteristics of COB Flex Strips

    If you’ve been listening, the advantages and disadvantages of COB flexible light strips should be obvious, so now let’s get into some specific details about this sort of strip. If you’re acquainted with LED strips, then lots of this may sound familiar, but there are some differences during this form of strip, so it’s best to test out the guidelines below before using COB strips.

    Cut and Connect

    COB led strip can cut this strip just like our other strip lights. Please only cut along the cut marks marked on the strip every 50mm (24) / 25mm (12V). This allows you to cut the strip to a custom size or add gaps to your application. The cut strips can be used again and are best connected by soldering, but if this is often not an option, our COB strip connectors also are available as an option.


    COB led strips are dimmable as well as regular SMD led strips.
    You can use DALI, Triac, PWM, 0-10V dimming power supply use with COB led strips to achieve dimming.

    Color Options

    White light: 2700K, 3000K, 4000K, 6000K, and other custom color temperatures are available

    Colorful light: Red, green, blue, yellow, pink, etc., are available.

    Tunable white, RGB, RGBW are all available.

    IP grades

    IP20 none waterproof, IP52 silicone drip, IP65 silicone sleeve, IP67 silicone sleeve, and other various waterproof ways are available.

    COB led strip light applications

    Furniture & wine cabinet
    Holtel renovation
    KTV & KTV bar
    shopping mall

    How to install the COB led strip light? (step by step)

    1. Clean the surface where you wish to put in the COB led strip light.
    2. Cut the scale of the COB led strip light you would like to put in.
    3. Tear the 3M backside of the COB led strip light.
    4. Paste the COB strip light where you would like to put in.
    5. Connect the ability supply with COB led strip light.
    6. If you wish to attach the COB led strip light, you’ll be able to solder or use the connector.


    We hope you learned much from this article and will take some information away with you so you can start using the COB led strip for your hydroponic grow room or indoor garden. If you need to know more about these COBs, then we highly recommend visiting CREE itself for further information and technical support.

    If you need some of the led strip lights, pls contact Lightstec.


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      Manager Director-Jerry

      About Author
      Founder of Lightstec.Engineering degree.More than 13 years working experience in led lighting business.Familiar with producing led lighting products.This blog share you knowledge and solution in led lighting.Welcome sourcing led lights from China.

      2 thoughts on “Everything You Would Like to Know About COB led Strips-From Factory”

      1. For our CRI>90 24Vdc RGB 560/640/840LEDs/m COB strip
        ( We can print your company’s logo on the PCB. )
        Technical Parameters:
        1. Uniform light distribution and shadowless effect
        2, CRI>90, 14W/m, 560lm/m,Also have high brightness 24Vdc, RGB Color
        3, 10mm width PCB for good heat dissipation.
        4, High density LEDs 560/560/840 pcs per meter, no darkness, lit effect is better.
        5. Neon COB rgb are also available
        6, CE, RoHS, UL & TUV; 5 years warranty.

      2. We are a high-quality source factory specializing in the production of LED Neon Flexible Strips and LED Flexible Light Strips, and we can customize the products you need.
        All R&D, quality, and production management personnel in our team come from Shenzhen Optoelectronics Co., Ltd., and have the same quality system. A self built production base in Nantong, Jiangsu, China, with a monthly production capacity of 1 million meters. All of our products have passed CE, Photobiology UL, RoHS and other certifications.
        The 2023 Shanghai International LED Exhibition will be held at the Shanghai Pudong New International Expo Center (2345 Longyang Road) from September 4th to September 6th, with exhibition number C47. Welcome to China and look forward to meeting you.


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