I purchased 110v LED bulbs before from other sources and they had a 60hz flickering effect from the simple circuit of the LED's working as half-wave rectifiers, thereby turning on and off with each phase change of the AC voltage. Do these have that effect?

Posts (27) | Reviews (0) | Tip Post

Hi Tornado, these LED bulbs do flicker at 60hz just like flourescent bulbs. We'll see if we can add some electronics components to it to increasae frequency or eliminate fickering.

For regular users, chances are very high that you already experience these flickering with regular flourescent lights at home, office, or on campus. These LEDs perform the same way as what we are used to.

Posts (2570) | Reviews (0) | Tip Post

By the way, I've tested the flickering effect by a video camera pointing at the lamps (distortion caused by flickering). Flickering cannot be noticed by bare eyes, just as you can't tell if it's hard to tell if a traditional flourescent lamp is flickering.

Posts (2570) | Reviews (0) | Tip Post

One way to reduce or eliminate the flickering is to add an electrolytic capacitor to the circuit. If the LEDs are getting AC, you will also need to add a diode or wave bridge (rectifier) in between the AC source and the capacitor. This way the capacitor will charge when the positive voltage is present, and power the LEDs for the 1/60th or 1/120th (if used with a wave bridge) of a second needed. A wave bridge would be preferred, since it will power the LEDs and charge the capacitor when the voltage is + as well as -.

One thing to note is that using this method will raise the voltage slightly, since the 110-120V is RMS, and using a capacitor will bring it closer to the peak voltage, which I believe is about 140-160V.

Posts (1) | Reviews (0) | Tip Post