Recently, some clients complained that our bulbs keep glowing when powered off. We paid close attention to it and has asked our engineers to do some research. Then we found a couple of possibilities:

1. Some light switches run a small amount of current through the bulbs even when off, usually to power small devices at the switch like a timer, motion sensor, or night light. Do your switches have either of those features, or something else like that? The way those devices work is instead of having a hot/neutral pair powering the switch, they just sit inline with the hot wire and draw a very small amount of power. Old fashioned incandescent bulbs won't light up if there's only a small amount of electricity running through them, so you would never notice this current, but LEDs are much more efficient and apparently are getting enough power to run.

2. If it's a dimmer switch, its circuit that has an internal snubber and is not switched off entirely. The weak current still can light up a LED bulb.

Those switches serve well for old-fashioned incandescents but not for regular LED bulbs. However, now our LED bulb has been improved through our tireless efforts. The new product has been tested strictly and it works very well. It can be surely turned off completely.

We Kakanuo never stop being better. We are determined to build gold brand in small LED bulb field.