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2. 50 Times Cheap Fixes Had A Major Impact On Home Life - AOL

   www.aol.com/55-people-share-relatively-cheap...

   DIY fire pit was about $50 worth of retaining wall blocks, also completely worth it. ... Adding 4 recessed lights on a dimmer switch is under $200/room and is such a quality of life improvement ...

3. 0-10 V lighting control - Wikipedia

   en.wikipedia.org/wiki/0-10_V_lighting_control

   The switch is controlled by a PWM (Pulse Width Modulation) signal, which alternately turns the switch on and off at a rapid rate. The relative proportion of off time vs. on time determines brightness. For example, if the switch is off 10% of the time, the resulting control signal would be the equivalent of 1 V produced with a variable resistor.

4. Dimmer - Wikipedia

   en.wikipedia.org/wiki/Dimmer

   They enable computer control via networked switches, but do not require it. Their cost is about the same as the older "dimmability" circuitry that they replace in LED bulbs, fixtures or drivers. A residential-type dimmer switch with sliding knob to change brightness. The device is small enough to fit into a regular wall box provided for a switch.

5. LED circuit - Wikipedia

   en.wikipedia.org/wiki/LED_circuit

   Simple LED (Light Emitting Diode) circuit diagram. In electronics, an LED circuit or LED driver is an electrical circuit used to power a light-emitting diode (LED). The circuit must provide sufficient current to light the LED at the required brightness, but must limit the current to prevent damaging the LED.

6. Light-emitting diode - Wikipedia

   en.wikipedia.org/wiki/Light-emitting_diode

   Switch on time: LEDs light up extremely quickly. A typical red indicator LED achieves full brightness in under a microsecond. [69] LEDs used in communications devices can have even faster response times. Focus: The solid package of the LED can be designed to focus its light. Incandescent and fluorescent sources often require an external ...

7. Light switch - Wikipedia

   en.wikipedia.org/wiki/Light_switch

   Two light switches in one box. The switch on the right is a dimmer switch. The switch box is covered by a decorative plate. The first light switch employing "quick-break technology" was invented by John Henry Holmes in 1884 in the Shieldfield district of Newcastle upon Tyne. [1]