Artificial lights
Download as PPTX, PDF0 likes264 views
This document discusses the four main types of artificial lighting: incandescent, high-intensity discharge (HID), compact fluorescent, and LED lighting. It provides details on the characteristics, advantages, disadvantages, and common uses of each type. Incandescent bulbs are energy inefficient but provide consistent light quality. HID lamps have high efficiency but are expensive to purchase and replace. Compact fluorescent lamps last longer than incandescents but contain mercury. LEDs are now the most energy efficient and versatile option, being used for street lights, signs, ceiling panels, and more.
Artificial lights
- 2. TYPES OF LIGHTING Incandescent Lighting High-Intensity Discharge (HID) Lighting Compact Fluorescent Lighting LED Lighting
- 3. Incandescent Lighting: • Also called as tungsten filament bulb. • Traditionally used light source. • They are energy inefficient and hence are replaced in many applications by LEDs, HIDs. • A 60 watt incandescent bulb costs upto Rs.10 per piece. • The luminous energy of a typical incandescent bulb is 16 lumens/watt. Advantages : Light quality and color are very consistent. Disadvantages : Requires lot of energy and faster degradation of filament leading to shorter lifespan. Use : Mostly used in indoors.
- 4. HID LIGHTING: • These lamps provide high luminous efficiency. • Long life span. • Economical light source. • Price depends on the various types and also sizes. • The highest- efficiency halogen bulbs produce 38 lumens/watt. Advantages : Their blue light is close to natural daylight, so they provide greater visibility. Disadvantages : They are expensive when you buy it and even more expensive when you replace it. Use : Mostly used in car headlights.
- 5. CFL LIGHTING : • Designed to replace an incandescent light bulb • The lamp use a tube which can be curved or folded. • Lasts 8-15 times longer than incandescent bulbs. • Their luminous efficiency is 50-70 lumens/watt. Advantages : Much more efficient then incandescent bulbs and highly versatile. Disadvantages : The presence of mercury in it makes it unfit for environment. It needs to be disposed off correctly. Uses : Used in residential applications, for ceilings, table lamps.
- 6. LED LIGHTING : • Most energy efficient lights. • Wide applications, used almost everywhere. • Long life span of about 2 years. • 3, 5, 7, 9, 12, 15, 18 watts LEDs are normally used and they cost Rs. 90-180 according to the watts. • They come a warranty of 2 years. • There are various different shapes, sizes and colors and types of LED lights. Advantages : They are energy efficient. Can be used anywhere and everywhere. Different colors available. Disadvantages : Voltage sensitive, they are provided with a choke for regulating high power.
- 7. Uses : • Used in flood lights. • Used in street lights. • Used for garden lights. • Used in traffic signals. • Used in advertisement boards. • Used in all types of decorating lights. • Used in panels for ceiling lights. Now a days strip lights are also available in LEDs whose cost starts from Rs. 40/m upto Rs. 110/m depending on the type. The cost of LED tubelights range from Rs.200 to Rs.900 according to quality and offers lumens of 900 for 20 watts and about 3600 for 40 watts.
- 8. The garden lights of 8-12 watts produce 600-1000 lumens. The panels lights are available in different shapes and different cut out diameters and they range right from 3watts upto 15 watts. The price of panel lights starts from Rs. 200/ piece and varies according to the shape and size. Different wall lights are also available in various shapes and sizes from 3-6 watts.
- 9. Flood light LED bulb LED panels Street light Garden light Strip light Wall light