[Erasmus]

The typical white LED is also phosphor-based, so it has a time-smoothing effect similar to that of a fluorescent.

You can also get tri-color LEDs, which have three chips that emit primary colors and whose intensity can be balanced for a wide gamut of colors. These are more expensive per unit of light output. Since these have no phosphors, there is no time-smoothing effect.

You’ll never get entirely rid of the light pulsations, because the efficiency of an LED depends strongly on pulsing high currents through it at low duty cycles. However, the circuitry can be designed, for a price, to make the pulses high in frequency, in which case the pulsing is likely to be noticed only in the stroboscopic effects seen with rotating machinery and the like.

[DB]

Thanks.

Are the “LED”s that use phosphor still called LEDs? I assume the LED is UV or some other color that excites the phosphor. The bummer with phosphor is it dies over time. LEDs have a very long life in comparison I believe. Fluorescent lights dim over time fairly quickly due to the phosphor decaying. The more light you get out of it the faster it goes.