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The general rule that I’ve always heard is that to avoid individual bright spots your LEDs should be farther away from the diffuser than they are from each other, and most LED strips come in 3 different densities: 30 LEDs per meter, 60 LEDs per meter and 144 LEDs per meter so right away it seems like it might be close to impossible to get a completely diffused look from the 30 LEDs per meter density since using that general rule our diffuser would need to be over 32.5mm tall, but there’s only one way to find out, so lets get testing.

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Correlated Color Temperature (CCT) can be defined as the color of white light a light source is emitting. CCT is measured in Kelvin (K). The different color temperatures along the Kelvin scale correlate with different shades of white light, all of which impact how an individual perceives the space. LED lights are typically grouped into 3 different color temperatures: warm white, natural white, and cool white. Warm white gives off a yellow shade of light, natural light closely resembles the color of light given off from the sun, and cool light has a slightly blue tint to it.

I’ve got two identical channels, one black and one bare aluminum and for control I’ll use the flat diffuser on both. On the left is the black channel, and on the right is the bare aluminum channel and you can see at 30 LEDs per meter neither of them can completely diffuse the LED strips, but the black channel is significantly dimmer than the bare aluminum. At 60 LEDs per meter the unfinished aluminum does a slightly better job at diffusing while maintaining better brightness and the same is true with 144 LEDs per meter. According to my measurements the average brightness reduction for the black deep channel with a flat diffuser was 58% vs just 36% brightness reduction for the bare aluminum channel with flat diffuser. Moral of the story, unless you really need it for your aesthetic, avoid the black channels in favor of bare aluminum.

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Power consumption is measured in watts, which indicates the amount of energy used by the light source. LEDs are highly energy-efficient, consuming significantly less power compared to traditional incandescent, halogen, metal halide, or fluorescent lights while providing the same level of brightness. Lower wattage in LED lights translates to reduced electricity bills and less environmental impact.

If you’re wondering I did pay full price for all these diffusers and as always there are no sponsored reviews on my channel. However, the links in the description are affiliate links so if you appreciate the time and effort that it takes me to make these videos and you want to show some thanks, then go ahead and use those links because I do get a small portion of the sale at no cost to you.

The best way to get that second look is with LED diffuser channels but with those you’ve so many choices to make. Is black or silver better? What about deep or shallow? Does the shape of the plastic cover matter? And what LED strip density should you use? Does all that sound overwhelming to you? Well don’t worry, answers to all those questions and a lot more are coming up today on the hook up.

When it comes to LED strip lighting there are two very different styles. On TikTok you’ve got highly exposed, bare, flashing, um… LED strips, and pretty much everyone else wants soft diffuse light with no hot spots and no visible individual LED dots.

The sweet spot for LED density in terms of price, power consumption and aesthetic is definitely 60 LEDs per meter and my two favorite diffusers to use with those strips are the shallow aluminum channel with the tented diffuser and the deep aluminum channel with the spotless diffuser. Between the two the spotless diffuser is slightly more spotless, but the tented diffuser looks better when it’s off, has a better mounting system, less brightness reduction and also gives that side profile light that I think looks pretty cool.

As I said If you’ve ever looked on Amazon for LED diffuser channels you know there are a ton of different vendors, styles and colors, but are those things really important? To answer that question once and for all I spent a few hundred dollars to buy basically every variation of LED channel, and every LED strip density to figure out which combinations give you the most diffuse light with the smallest amount of brightness reduction for the least amount of money.

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I’ve also reached out to Muzata, the company that sells most of these diffusers and asked them to produce a spotless version of the 45 degree channel, as well see if they would sell the spotless diffusers on their own for those of us who already have aluminum channels and want to upgrade our diffusers. If that ends up happening I’ll update the links in the description and pin a comment with the updated info.

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On some listings you may see the option of milky white or smoky grey diffusers, but in my testing I wouldn’t even call the smoky grey version a diffuser. It does hide the LED strip when the power isn’t on, but you can see that once they do turn on the entire strip and every LED is visible. On left is 60 LEDs per meter with deep black channel and a smoky gray diffuser, and on the right is deep black channel with a milky white diffuser. The craziest part about this is that they both result in about the same amount of brightness reduction which is around 58%.

30 led per meter strips on the other hand are really hard to completely diffuse. If you’re using them as indirect light then no diffuser is best since that will give you the most brightness, but if you want to conceal them then a shallow channel and flat diffuser results in the smallest amount of brightness reduction. If you absolutely need to use the 30 LEDs per meter density in a visible location then the bare aluminum deep channel with the curved spotless diffuser did the best job reducing hotspots, but still with less than perfect results and a 56% decrease in brightness.

Thank you so much to all of my patrons over at patreon for your continued support of my channel, and if you’re interested in supporting my channel please check out the links in the description. If you enjoyed this video please hit that thumbs up button and consider subscribing, and as always, thanks for watching the hookup.

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Next, lets see how the deep channel with the spotless diffuser compares to the tented diffuser. At 30 LEDs per meter the advantage definitely goes to the spotless diffuser, but at 60 LEDs per meter it’s a bit of a toss up, because even though the spotless diffuser on the right does a slightly better job giving that completely spotless look it does cause a brightness reduction of 56% vs just 35% brightness reduction with the tented diffuser, plus the tented diffuser also gives some side profile light which I think looks pretty neat. At 144 LEDs per meter they are both completely spotless but as expected the tented diffuser is significantly brighter.

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All these same principles apply to the 45 degree channels, except the curved diffuser version doesn’t have the thicker part near the center like the spotless diffuser does and as a result doesn’t work quite as well. Still the curved diffuser does a significantly better job than the flat diffuser, but neither of them are able to achieve a completely spotless look with 30 or 60 LEDs per meter and the flat diffuser can’t even do it at 144 LEDs per meter.

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Starting out with 30 LEDs per meter you can see the shallow channel on the left and the deep channel on the right and as we would expect, the deep channel does a significantly better job diffusing light at each brightness level, but the dots are still visible. At 60LEDs per meter the deep channel is really close to achieving the perfectly diffuse look, and at 144 LEDs per meter all the hotspots are gone. So for the most diffuse look there’s no question that deep channels are significantly better than shallow channels but there is a drawback. I also measured the drop in brightness compared to no diffuser at all, and on average the deep channel led to a 36% drop in brightness vs only 22% for the shallow channel, so if you’re just looking for a channel to conceal or mount your LEDs and they won’t be directly visible than shallow channels are the way to go.

I’ve got 3 different shapes to test: a flat diffuser that sits flush with the top of the channel, a curved diffuser that the manufacturer calls their spotless diffuser which sits above the channel and also has a thicker area near the middle of the curve, and then what I call a tented diffuser that stands up above the channel to give additional height and some side profile light as well. Unfortunately the tented diffuser only fits on the shallow channel that it came with, so I can’t test the deep channel with the tented diffuser.

Perhaps unsurprisingly black channels lower brightness and lower diffusion due to their lower overall reflectivity and should be avoided unless you absolutely need them.

For channel types we’ve got shallow unfinished aluminum, deep unfinished aluminum, deep black aluminum, 45 degree deep unfinished aluminum and 45 degree shallow unfinished aluminum.

For the diffusers on our flat channels we’ve got flat milky white, curved milky white, flat smoky black and this unique tall milky white diffuser, while on the 45 degree channels we’ve got milky white flat and milky white curved.

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Starting out with 30 LEDs per meter, we’ve got the bare aluminum deep channel with flat diffuser on the left and the same bare aluminum deep channel with the spotless diffuser on the right. At 50% and 100% brightness the spotless diffuser doesn’t disappoint and gives as close to a spotless look as you can get with a 30 LED per meter strip. Switching it out for 60LEDs per meter the spotless diffuser lives up to its name again giving us the first time we’ve seen a completely spotless look through all the colors and brightness levels. Unfortunately, the spotless diffuser isn’t available to purchase with a shallow aluminum channel, but for comparison’s sake here’s what that combination looks like at 30 and 60 LEDs per meter, which although not perfect is a huge improvement over the flat diffuser.

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Correlated Color Temperature (CCT) can be defined as the color of white light a light source is emitting. CCT is measured in Kelvin (K). The different color temperatures along the Kelvin scale correlate with different shades of white light, all of which impact how an individual perceives the space. LED lights are typically grouped into 3 different color temperatures: warm white, natural white, and cool white. Warm white gives off a yellow shade of light, natural light closely resembles the color of light given off from the sun, and cool light has a slightly blue tint to it.

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