COB Dotless Led strips

COB aka. Dotless led strips

COB (Chip-On-Board) LED strips are often referred to as "dotless" or "seamless" due to their unique construction and light output. Traditional (SMD) LED strips have individual LED chips spaced out along the strip, which can lead to visible dots or points of light, especially when used with diffusers or light bars.

COB LED strips, on the other hand, have multiple (up to 840 leds per metre) LED chips packed very close together on the board. This allows the light from the individual chips to blend together before it leaves the strip, creating a more consistent and continuous line of light. Hence, they are often referred to as "dotless" or "seamless" LED strips.

The term "dotless" or "seamless" refers to the visual output of the light, not necessarily to the physical structure of the LED strip. It's important to note that while COB LED strips provide this smooth light output, they still require proper installation and heat management to ensure they operate efficiently and have a long lifespan.

COB Led strip products

We have many led strips with COB led technique, such as single color, CCT, RGBW, RGB+CCT.

Single color dottless COB led strips

Single color led lights with 3000K and 4000K, high CRI up to 98. There is also 5 mm super narrow COB stip for small narrow spaces.

CCT COB led strips 

This is most popular COB led strip category. You can adust color temperature freely from 2500K to 6500K. There is IP21 for interior use and IP65 for outdoor use. Multiple power versions from 3,6W to 14,4W per meter.

RGBW COB led strip

Popular with youg people and commercial use. NEON like even light with this RRGB+W COB led strip. White led included is 4000K, so you dont have to try to make white light from RGB dots. 4000K has CRI95 accurate quality.

RGB+CCT COB led strip

You want it all? This is ultimate Led strip. No dots, you can adjust colors AND white color temperare in same COB led strip. Its only 12mm wide, cutmark is 5 cm and CRI for white light is 95! Is better than HUE led strips in any measure.

  Philips HUE COB LED RGB+CCT
Power 10W per metre 15W per metre
Colour rendering CRI 80 CRI 98
Lumen 1000 lumens per metre 1000 lumens per metre
 Led quantity 54 LEDs per metre 540 LEDs per metre
Width 15mm 12mm
 IP class IP67 IP65
Cutting-off interval 33cm 5cm
Lifetime 25000 hours 50000 hours
 Requires led profile no yes 

For more detailed comparison between COB RGB+CCT and HUE led strip can be read here.

What is Dotless led strip, or COB?

COB stands for Chip on Board, which means that the LED chip is packaged directly on a printed circuit board (PCB). Flexible strip lighting “Chip on Board”. COB-LEDs are essentially a simplified approach to LED design.

A standard SMD (Surface Mount Device) LED has an LED chip holder (bead) with the actual LED chip inside and is then covered with a phosphor coating.

Pointed led strip structure
Traditional SMD led strip consists of several independent led circuits

The COB-LED strip structure removes all excess, leaving behind the LED circuit, the yellow phosphor overlay and the junction.

COB dotless led strip light structure
COB dots free led strip light consists of a single led circuit printed directly on a printed circuit board

How is COB LED strip made?

  1. “Printing” of printed circuit boards
  2. Chip printer on PCB
  3. Printing of resistors on PCB
  4. “Reflow”, where at 65 degrees the components are combined
  5. Pouring the fluorescent mass onto the led strip
  6. COB led strip for the oven
  7. Led strip light testing and packaging.

Advantages and disadvantages of COB LED strip

Now that you know something about the technique, let’s go through the pros and cons of both techniques.

Advantages of COB LED strip lighting:

Dotless LED strip, COB led strip.

One of the biggest wishes of traditional LED strips is that there would be no dots on the LED strip. A pointless LED strip light is therefore possible with COB technology, as there are points of light up to 840 metres below a flat mass, so no visible points. The light is softer and calmer when it looks like a steady source of light rather than a pinpoint of illumination.

Dotless led strip COB Led roll ledstore.fi

SMD led strips (cri 90), contain fewer of the larger led diodes. Traditionally, the number of LED light points in the so-called. the marketti led strips have 30-60 pieces per metre, so you can see very clearly each light point. There are SMD led strips with 240 LEDs per metre (LedStore EQUAL), but with these types of strip you have to take care of really good cooling, because SMD diodes produce a lot of heat. So in SMD led strip lights you can always see the dots.

Traditional SMD light strip close up

With 840 LEDs per metre of COB strip, it is difficult to see individual LED dots. You can only see a single LED if you dim the strip to about 1-5% and stand next to it. This makes the COB led strip light ideal for applications where

  • The LED strip itself cannot be hidden from view (the surface of the fixture)
  • The illuminated surface is less than 60cm from the LED strip (Shelves).
  • Reflective surfaces, such as stone/glass, are everywhere. (dotted led strip)
  • Those installations where you want an excellent neon effect (RGB versions).

More flexibility

COB LED strip lights are much more flexible than other traditional LED strip lights due to the small size and even distribution of the diodes. These diodes are so small and close together that no point on the strip is actually aligned, e.g. in a corner. This uniformity makes it easy to place the strips unplanned compared to SMD-LEDs, where the circuit itself hits the exact corner where it should bend. The COB led strip light is therefore more flexible in terms of installation comfort and ease of installation at every bend and angle, and there is no need to worry about breaking the led circuit at a 90 degree angle.

More stable, fewer problems

COB led strip is one long led chip directly attached to the PCB, there is no gold wire in its installation. Many of the problems with traditional SMD LED strip lighting are caused by the gold wire inside the LED “beads”. Because gold thread is thin, it breaks easily, for example from excessive heat.

The circuit design of the COB led strip uses three circuits, first in parallel, as a group, then each group and then in series to form a cut-off distance of 2.5m-10cm. Even if two LED circuits are bad at the intersection, the light will still continue forward. And because a COB led strip light has up to 840 LEDs per metre, even if 1-2 circuits don’t light up, no dark area, you can see and to the eye it’s still a score-free led strip.

In the traditional SMD led strip light, a faulty led circuit turns off the whole cutting pitch and that 5 or 10cm cutting pitch is completely dark.

Wide opening angle

A traditional SMD strip light has a beam angle of 110 degrees, while a COB strip light has a beam angle of 180 degrees. Of course, in both cases, the installation profile will affect the final result.

Led strip opening angle

The weaknesses of COB led

Difficult to maintain colour consistency

As there are no COB-LED strip loading machines on the market, all COB-LED strip manufacturers only take samples to ensure colour uniformity. So for COB LED strips, it is difficult to ensure that 100% is within the 3-phase colour tolerance. This brings us to quality control and its importance. High-quality dot-free led strip is difficult to implement.

Lower light output

The efficiency of COB LED strip lighting is currently only around 120 Lumen/Watt.

If you need higher light output, the SMD led strip light is better, as SMD reaches up to 200 Lumen/Watt. The most common ones, of course, at the 100-150Lumen level.

Lower maximum power

The maximum power of a COB LED strip is recommended to be only 15 W/m. Because the number of chips per meter is too high if the power exceeds 15 W/m. The problem is controlling the heat of the chip. Also, the life of COB LED strip is shortened in too hot conditions.

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  1. LED CCT STRIP SOLO 7,2W/m (36W/5m) 24V, ADJUSTABLE 2700-6500K, IP65
    • 5 meter reel, 2500K-6500K, 24V
    • 12 mm wide, extra smooth 640 led/m
    • 7,2 W/m and 795 lumen/m
    • Excellent CRI 97
    • 10 cm connection cables in both ends of the 5 meter reel
    Out of Stock
    €129.00
  2. LED CCT STRIP SOLO 14,4W/m (72W/5m) 24V, ADJUSTABLE 2700-6500K, IP20
    • 5 meter reel, 2500K-6500K, single light source
    • Even light, no dots, 840 led/m
    • 14,4 W/m ja 1584 lumen/m
    • Excellent CRI97
    • 10cm connection cables on both ends
    In stock 2
    €139.00
  3. LED STRIP SOLO SLIM 7,2W/m (36W/5m) 24V, 4000K, IP65
    • 5 meter reel, 3000K, 24V, IP65
    • our smallest model 5mm, extra smooth 608 led/m
    • 7,2 W/m and 795 lumen/m
    • Excellent CRI 97
    • 10cm connection cables in both ends
    In stock 42
    €99.00
  4. LED RGB+CCT STRIP SOLO, 19W/m (95W/5m) 24V HIGH CRI98
    • RGB and tunable white in one!
    • SOLO lineup, NO LED DOTS!
    • white light 400-800 lumen/m
    • Can be used with RGBW drivers
    • IP21
    • 24V
    In stock 76
    €199.00
  5. LED CCT STRIP SOLO 3,6W/m (18W/5m) 24V, ADJUSTABLE 2700-6500K, IP65
    • 5 meter reel, 2500K-6500K, 24V
    • Our flattest power model, smooth 360 led/m
    • 3,6 W/m and 350 lumen/m
    • Excellent CRI 97
    • 10cm connection cables in both ends
    In stock 63
    €89.00
  6. LED RGB+W 4000K STRIP SOLO, 15W/m (75W/5m) 24V HIGH CRI95 IP65
    • RGB and tunable white in one!
    • SOLO lineup, NO LED DOTS!
    • white light 400-800 lumen/m
    • Can be used with RGBW drivers
    • IP65
    • 24V
    In stock 53
    €159.00
  7. 1m LED STRIP SOLO 14,4W/m 230V, 4000K, IP65
    • 1-100 meter reel, 4000K, 230V, IP65
    • our smallest 230V model 8 mm, extra smooth 680 led/m
    • 14,4 W/m and 1500 lumen/m
    • Excellent CRI 95
    • can be ordered also every 10 cm in lenght
    In stock 99
    €22.50
  8. LED COB STRIP 14,4W/m (72W/5m) 12V, 3000K, IP65
    • 5 meter reel, 3000K, 12V, IP65
    • 10mm wide, smooth light with 528 led/m
    • 14,4 W/m and 600 lumen/m
    • Excellent CRI of 97
    • 10cm wires in both ends
    In stock 31
    €89.00
  9. LED COB STRIP 14,4W/m (72W/5m) 12V, 4000K, IP65
    • 5 meter reel, 4000K, 12V, IP65
    • 10mm wide, smooth light with 528 led/m
    • 14,4 W/m and 600 lumen/m
    • Excellent CRI of 97
    • 10cm wires in both ends
    In stock 34
    €89.00
  10. LED CCT STRIP SOLO 30 W/m (150 W/ 5m) 24V, ADJUSTABLE 2700-6500K, IP20
    • 5 meter reel, 2500K-6500K, single light source
    • Even light, no dots, 840 led/m
    • 30 W/m ja 2600 lumen/m
    • Excellent CRI97
    • 10cm connection cables on both ends
    Out of Stock
    €229.00
  11. 1m LED STRIP SOLO 14,4W/m 230V, 3000K, IP65
    • 1-100 meter reel, 3000K, 230V, IP65
    • our smallest 230V model 8 mm, extra smooth 680 led/m
    • 14,4 W/m and 720 lumen/m
    • Excellent CRI 95
    • can be ordered also every 10 cm in lenght
    In stock 459
    €22.50
  12. 1m LED STRIP SOLO 7,2W/m 230V, 3000K, IP65
    • 1-100 meter reel, 3000K, 230V, IP65
    • our smallest 230V model 8 mm, extra smooth 680 led/m
    • 14,4 W/m and 720 lumen/m
    • Excellent CRI 95
    • can be ordered also every 10 cm in lenght
    In stock 385
    €21.50
  13. 1m LED STRIP SOLO 7,2W/m 230V, 4000K, IP65
    • 1-100 meter reel, 4000K, 230V, IP65
    • our smallest 230V model 8 mm, extra smooth 540 led/m
    • 7,2 W/m and 400 lumen/m
    • Excellent CRI 95
    • can be ordered also every 10 cm in lenght
    In stock 998
    €21.50
  14. LED COB STRIP 14,4W/m (72W/5m) 24V, 4000K
    • 5 meter reel, 4000K, 25V, IP21
    • 10mm wide, smooth light with 640 led/m
    • 14,4 W/m and 1200 lumen/m
    • Excellent CRI of 97
    • 10cm wires in both ends
    In stock 187
    €89.00
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