Thanks to continuous development of electronics, we can avoid traditional lighting powered with 230V, which has a lot of disadvantages compared to low-voltage LED lighting operated at constant currents.

• disturbances and surges often seen with an eye
• lower strength of lamps and their ease of damage from surges
• lower efficiency at the same power supply
• the risk of electric shock, raise in areas with high moisture , outdoor and indoor, saunas, special areas, swimming pools, etc.
• frequency 50Hz tiring the eyes from blinking and flashing (especially when using dimming)
• frequent damage of the lamps at the time of switch on, particularly halogens , fluorescent , efficient lamps, LEDs
• high power consumption and surges at startup
• major disruption of network generated by starters of fluorescent lights
• possibility to “fire” or switch off the fuse protection in such cases
• a long time of warm-up to achieve full light of most light sources
• changes in light levels due to voltage instability, matting bulbs under high temperature, burning of gas in the fluorescent lamps
• change the color of light LED, lighting and fluorescent as a result of variable parameters

Most of these disadvantages can be eliminated by supply constant voltage and current of lamps for lights (low voltage DC power supply) eg.  12V .
This requires resignation from some sources such as fluorescent lamps , Gas etc. Classic lights as bulbs or halogens, it is difficult to use, due to the very high currents needed to obtain the required power light illumination . It also involves the use of substantially thicker wires supplying power to reduce energy loss and voltage drop on wires .

Nowadays, the best kind of lamps suitable for this application are the LEDs in a variety of forms and cases.

The development of LED lighting technology, gives much larger number of solutions comparing to all other types of lamps. This gives oportunity to realize complete lighting in houses, buildings, ofices, hotels using very efficient and durable LEDs, RGB LEDs, which can be controlled directly from eHouse home automation system .

Powering LEDs with constant voltage and direct  current eg. 12 volts allows:

• savings in electricity for lighting the building above the 500%
• obtain constant and desired color of light for LEDs
• substantially longer time of live for LEDs
• lack of distortions and bursts of energy at mains frequency 50Hz caused visible peaks of light illumination
• electronic control directly from eHouse system without having to install relays involving high-power devices
• the possibility of usage of emergency power from the battery.
• large number points of light provides an even level of illumination and lot of independent lighting scenes
• implementation of safe and trouble-free lighting in wet locations , outdoors , saunas , pools , etc .
• facilitate assembly , without the use of lighting fixtures and enclosures , waterproof adhesive tape diodes
• quick refund of investment costs for the installation and lighting lamps

LEDs can successfully implement a complete lighting in most of the rooms:

• the main lighting (and decentralized multipoint) instead of the central
• night lights
• Discrete
• ornamental and decorative lighting
• stair lighting, paths, routes, terraces, gates, inputs, emergency exits, halls
• safe lighting pools , trays , saunas , conservatory, aquarium
• Picture Lights , Furniture , cabinets , wardrobes , Ornamental Sites
• sconces
• lamps near the beds
• lighting glasses, tables , work places
• Television Lighting
• lighting lofts , storage
• Accent lighting

The main features of LEDs diode

• point character (a small viewing angle) LED lighting
• low power light in comparison with classic lighting
• requires a large amount of LED light points to obtain a uniform illumination and to achieve the required level of brightness over the entire surface areas
• requires a large number of independent lighting circuits
• wide variety of lighting, color, possibility of adjusting the brightness

To achieve high functionality and ease of use LEDs lighting,
it is necessary to take into account their characteristics, using as the light sources.

• requires controllers or home automation for control a large number of outputs
• it is necessary to create a large number of (multi) different scenes and high-density LED lamps.
• Automation is required in order to simplify control and allows easy and fast reconfiguration scenes, programs, while a home without having to switch cables.
• use of infrared remote control to avoid the large number of switches
• the ability to automatically turn on light scenes such as night lighting , Decorative etc .
• ensure a good power supply, voltage stability and control to enable long-life work without flickering , illumination color changes, etc.

Ehouse system (RoomManager, EthernetRoomManager) are ideal for controlling low voltage LED lighting due to a large number of outputs to control lighting, heating and other home features (max 24 on/off + 3 dimmers).
Lighting scenes, groups and programs can be independently configured using PC computer or switch on /off individually.
These controllers centralize and integrate management all elements of lighting , heating and electrics devices in the room using a IR Sony remote controller.
Usage of eHouse system to manage lighting and heating, allows refund home automation system within 1 year after installation considering electricity consumption and heating energy prices.

Application of low voltage 12V lighting system allows installation without help of a qualified electrician and does not require inspections and formalities relating to the registration of the building. In addition, the use of 12V lighting ensures complete safety for use in areas exposed to moisture or flooding, extreme temperatures , Shock and safe for children.

Home automation controllers is based on microcontroller , which can be managed, inter alia:

• Sony IR remote control (standard SIRC), IR control panels
• PDA, mobile phone , smart phone, touch phone
• PC, Tablets , Wall mounted touch panel
• Web browser , FTP
• standard electrical switches
• automatically in response of motion detectors in the room or if it is too dark

RoomManager is advanced microprocessor controller optimized for control rooms. The architecture of eHouse home automation system based on RoomManager, is the cheapest available on the market due to the large amount of hardware resources in a single device, against to systems built from “small blocks” with built-in “modems”.
Each RoomManager can be individually configured from a PC according to the investor’s needs and expectations for a given room.

RoomManager can control following resources in rooms:

• heating (up to 7 independent segments)
• lighting (up to 24 independent outputs (group) on / off)
• any electrical equipment (on / off)
• LED lighting , RGB LED (3 independent dimmers or 1 RGB)
• hi-fi equipment , Audio , Video , TV
• Music playback control of Winamp application

Hardware Resources RoomManager’s:

• 24 digital outputs (open collector) max 15V/200mA
  • possible to direct drive of LEDs (output 12V/100mA) from RoomManager
  • possible to directly drive 12V to relays, (on / off) electrical devices at any voltage up to 230V (AC / DC)
  • possible to directly drive MOSFET transistor to turn on / off devices based on 12V DC (constant current, eg. LED lighting, RGB LED, Halogen)
• 12 digital inputs
  • connecting switches
  • contactors , reed
  • digital sensors
  • motion detectors
  • alarm detectors
  • any other devices outside eHouse system must be isolated (via relay or optoisolators)
• 1 analogue input to measure the value of the analog sensors (eg . lighting or other inverted scale) with programmable thresholds (min , max) ,
• 7 analog inputs for measuring the value from the analog sensors (eg . temperature) with programmable thresholds (min , max) ,
• built-in RS485 interface – eHouse system bus,
• built-in RS232 interface – TTL levels to install system extensions (BlueTooth , Mifare proximity access card reader),
• Calendar – scheduler to run the system event automatically (248 items) ,
• Infrared Receiver (IR) to control from remote controller or the control panel (standard Sony – SIRC) ,
• Infrared Transmitter (IR) to control Audio, Video , HiFi, TV, Sat to emulate the remote controller signal by for the device,
• Allows to manage Winamp application, installed on a PC (music playback control),
• Bluetooth Adapter to expand the control of BT or future media reception – control from mobile phone, PDA,
• The possibility of connecting the Mifare module (proximity card reader for identification , authorization and access rights settings) for the RM (eg . Hotel information systems or public buildings),
• Built-in events queue for run,
• 24 profiles (programs) for simultaneous switching of all outputs and setting the programmed thresholds (min , max) for all measuring inputs,
• Built-in communication and self-test, watch dog timer , protection against halting and hangs-up. The device is reset in the absence of communication.
• Firmware Upgrade features – directly from eHouse PC software package for increasing its functionality or new version releases without direct accessing or disconnecting module.

Connecting switches , sensors to digital inputs of RoomManager: Connecting digital outputs RoomManager and the actuators and LED lighting: Example of direct drive low-power LEDs light 12V / 1W (100mA) (24 individual scenes)