I did some testing a few years ago of the dimming of a handful of "smart" bulbs. My test was to put the bulbs into a desk lamp that was aimed straight down at

I did some testing a few years ago of the dimming of a handful of "smart" bulbs. My test was to put the bulbs into a desk lamp that was aimed straight down at the desk. On the desk was a lux meter. The meter was 41 cm away from the bulb. I was in a closed room with blackout curtains on the window and it was night. I'd turn out all other lights before measuring a bulb. Here are the bulbs I tested and the labels for their columns in the tables below: Label Bulb TP TP-Link Kasa white bulb MIW Merkury Innovations white bulb HW Hue white bulb MIC Merkury Innovations color bulb set to white HCX Hue color bulb set to X, where X can be CW cool white DW daylight white W white SW soft white WW warm white The various whites were set using Amazon's Alexa app rather than the Hue app. For each of these bulbs here are the lux readings I got at 1, 2, 3, 4, 5, 10, 15, 20, 25, 50, 75, and 100%: TP MIW HW MIC HCCW HCDW HCW HCSW HCWW 1% 14 135 64 135 10 7 10 5 3 2% 14 149 64 162 10 7 10 6 3 3% 26 162 65 170 11 8 11 6 4 4% 43 180 65 182 11 8 11 7 4 5% 58 190 66 200 13 9 13 7 5 10% 128 246 77 255 20 15 20 12 8 15% 196 303 91 322 34 25 34 21 13 20% 261 364 112 388 54 40 54 34 21 25% 325 428 143 451 74 67 74 46 29 50% 630 725 400 776 282 218 282 184 118 75% 909 1008 820 1099 650 483 650 410 263 100% 1160 1283 1382 1408 1146 850 1146 725 463 Here is the same data except for each bulb it is as a percentage of that bulb's 100% lux: TP MIW HW MIC HCCW HCDW HCW HCSW HCWW 1% 1.2% 10.5% 4.6% 9.6% 0.9% 0.8% 0.9% 0.7% 0.6% 2% 1.2% 11.6% 4.6% 11.5% 0.9% 0.8% 0.9% 0.8% 0.6% 3% 2.2% 12.6% 4.7% 12.1% 1.0% 0.9% 1.0% 0.8% 0.9% 4% 3.7% 14.0% 4.7% 12.9% 1.0% 0.9% 1.0% 1.0% 0.9% 5% 5.0% 14.8% 4.8% 14.2% 1.1% 1.1% 1.1% 1.0% 1.1% 10% 11.0% 19.2% 5.6% 18.1% 1.7% 1.8% 1.7% 1.7% 1.7% 15% 16.9% 23.6% 6.6% 22.9% 3.0% 2.9% 3.0% 2.9% 2.8% 20% 22.5% 28.4% 8.1% 27.6% 4.7% 4.7% 4.7% 4.7% 4.5% 25% 28.0% 33.4% 10.3% 32.0% 6.5% 7.9% 6.5% 6.3% 6.3% 50% 54.3% 56.5% 28.9% 55.1% 24.6% 25.6% 24.6% 25.4% 25.5% 75% 78.4% 78.6% 59.3% 78.1% 56.7% 56.8% 56.7% 56.6% 56.8% 100% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0% 100.0%