Abstract: A lighting device including an LED light source, wherein the LED light source includes a first LED strand for generating a first light with a first correlated color temperature and a second LED strand for generating a second light with a second color temperature different from the first color temperature. The lighting device further comprises control electronics with a controllable LED driver for driving the LED light source, wherein the control electronics comprise a switch for switching between the first LED strand and the second LED strand so that either the first LED strand or the second LED strand is activated depending on the switch position. A lighting system comprising the lighting device is further disclosed.

Abstract: A light sensing sequence recording apparatus includes a plurality of light sensing components and a light sensing sequence recording unit. The light sensing sequence recording unit is electrically connected to the light sensing components. Each of the light sensing components sends a light sensing signal to the light sensing sequence recording unit respectively at different times. The light sensing sequence recording unit records a light sensing sequence that the light sensing sequence recording unit receives the light sensing signals sent by each of the light sensing components respectively.

Abstract: A LED lamp which could directly replace an ordinary tungsten, halogen, or electricity-saving light bulb includes a filament, a lamp base and a thermally conductive electric insulator. The filament includes at least one AC LED device, and the thermally conductive electric insulator is filled in a cavity of the lamp base to mechanically contact with the filament and an electrode of the lamp base. When the AC LED device is powered on, the thermally conductive electric insulator provides a thermal channel to transfer heat from the filament to the electrode for heat dissipation enhancement. The LED lamp can be directly inserted into an ordinary bulb socket that is generally used in lighting fixtures, without having to modify the system of the lighting fixtures or use an additional adapter.