LEDs 12 volts: circuit, powerful, without a resistor, how many can be connected. Serial connection of LEDs to 12 volts. How to determine the polarity of LEDs. How to choose a power source for 12V LEDs.

Lamps in the ceiling of the bathroom: selection criteria and safety. How to calculate the lighting in the bathroom. Moisture-proof spotlights for the bathroom: location and level of moisture resistance.

Accuracy class of the electric meter: varieties for an apartment and a private house. How to find out the accuracy class of the electric meter: place of indication on the meter. What is affected by the accuracy class of the electricity meter.

Rope switch: lighting in the corridor, wall lamps and furniture lighting. Return retko switches-dargalka. Features of the use of switches with a rope: the right choice of installation and connection.

Two-key switch for concealed wiring: specifications. Advantages and disadvantages of double-key flush-mounted switches for concealed wiring. Recommendations for the selection and installation in the apartment.

Street LED lighting: varieties of lamps and lanterns. Advantages and disadvantages of outdoor LED lighting. What is duralight and features of its application for street lighting.

Light sensor: varieties, device and principle of operation. Wiring diagram for connecting a light sensor. Technical characteristics of the photo relay for street lighting. The choice of installation location of the ambient light sensor.

Surge protection 220V for home: protection methods, relays and sensors. How to protect LED lamps from power surges at home. The principle of operation of devices for protection against voltage surges in the electrical network.

Pulse relay for lighting control: device and principle of operation. How to connect a pulse switch for light: circuit. Varieties, characteristics of pulse relays and examples of their use.

LED lamp with motion sensor: characteristics and principle of operation. How to choose an LED lamp with a motion and light sensor for an apartment. How to disable the motion sensor on the LED lamp.

Halogen lamp: varieties, pros and cons. Which lamps are better for home: halogen or LED. Parameters and features of halogen light sources. How to check a halogen lamp. Protection unit and transformer for halogen lamps.