Philips 8w LED
Company: Philips
Lamp type: LED
Watts: 8
Lumens: 450
Voltage rating: 120Vac 60Hz
Color Temperature: Warm white
Dimmable: Yes
Other ID: 8EA26A60
120 hz luminosity fluctuations
The above plot shows the 5% luminosity fluctuations in the lamps output. The 1.2hz frequency is actually the beat frequency of the 33 msec sample rate and the 120 hz luminosity fluctuations. The 33 msec sample rate (30.3 hz frequency) has a 121.5 hz harmonic that mixes with the 120 hz frequency, resulting in a 1.2 hz output. Note that the turn-on time tests shows a 5 hz fluctuation because those samples were taken at 40 msec, causing the 125 hz harmonic to mix with the 120 hz.
For reference, the Philips 12.5w LED is the only lamp tested so far of any type that has essentially no 120 hz fluctuation visible at the resolution limit of my tests.