indirect light
6 likes4,607 views
This document discusses various types of indirect lighting techniques, including: 1. Cove lighting, which directs light up from fixtures mounted in coves or walls to provide diffuse ceiling illumination. Proper fixture placement and spacing is important to avoid shadows. 2. Valance lighting, which conceals fixtures behind a suspended valance to direct light up or down. 3. Cornice lighting, which mounts fixtures behind decorative cornice molding to uplight walls and ceilings. Purpose-built cornice for lighting must be securely mounted. 4. Soffit lighting, which hides fixtures in corners and edges to indirectly light rooms through reflected light off walls and ceilings. 5. Wall
indirect light
- 1. Assignment 3 Indirect Lighting A- Cove lighting is one of the basic lighting techniques, a type of up lighting that directs light to the ceiling plane from a cove on one or more sides of a room to provide overall diffuse illumination. It is also referred to as ambient luminescence. Cove lighting is typically mounted to or incorporated into a wall, but it can also be located within a ceiling coffer. Some things to consider when setting up a cove lighting detail: 1. Be aware of how you are positioning the fixtures. Any joints or gaps between fixtures will show up in the light pattern. Socket shadows (dark spots at the end of a lamp) can be eliminated by placing fixtures end-to-end, in a staggered or a slanted arrangement. Depending on source selection, make sure to use the appropriate spacing between fixtures as well as the positioning from the back wall of the cove. 2. The top of the lamp should be level with the cove fascia; if not, it will create shadow lines. 3. To prevent sharp cutoff lines, stop a cove short of the end wall. 4. Generally, ceiling surface should be a high-reflectance matte or satin finish surface. The inside surface of the cove should be flat white. This minimizes specula reflections. 5. As a cove nears end wall, maintain a minimum clearance of 12 inches at inside corners to prevent hot spots. 6. As the cove’s distance from the ceiling plane increases, the uniformity of the ceiling brightness will also increase
- 2. Types of Cave Lighting 1 - Rope Cove Lighting Fixtures This cove lighting option is the most inexpensive and the easiest to mount. Rope cove lighting is available in a variety of sizes and can be plugged into an electrical outlet. This type of lighting is not as bright as other types of cove lighting and should be used as an accent light source rather than a primary one. It will create a soft glow effect in a room. It can also be made to provide more light by installing 2 rope rows next to each other. If you decide to install to rows together, be sure you have read the recommendations provided by the manufacturer of the rope fixtures for the correct amount of space required for a safe installation.
- 3. 2 - Fluorescent Cove Lighting Fixtures These T5 fluorescent fixtures are energy efficient form of cove lighting. Installing fluorescent cove lighting fixtures requires more time and precision in the placement than rope fixtures. Some fluorescent cove lighting fixtures are designed to be overlapped so that there are no low light or dark spaces. These fixtures are more expensive than rope fixtures but they are still a reasonable priced lighting item. Adding the dimmer feature to these fixtures will add to the cost of the installation. 3 - Linear Cove Lighting Fixtures Linear or track cover lighting is pricier than rope and fluorescent fixtures but are low voltage and add a beautiful effect to a room. The bulbs can be moved to produce a brighter or dimmer result. As with the fluorescent cove lighting, these fixtures can also be dimmed. They work well as a means of illuminating counters, kitchen islands, bars and other task light areas. 4 - LED Cove Lighting Fixtures These fixtures are the most costly of all of the options however their diminished electricity requirement enables them to be used for extended periods of time without the need to change or replace them. These fixtures can be secured to aluminum and encased with prismatic covers. A dimmer can be attached to these fixtures. The bulbs are available in a wide range of lighting effects from warm white to color. 5 - Ceiling Cove Lighting Installed under a lip or trim on a wall and faced upwards, these fixtures shine directly on the ceiling area. They can be installed throughout the entire perimeter of the ceiling or in specifically chosen accent spots. The bright light provided by the bulbs makes the ceiling location successful as a primary light source. The cove lighting fixtures should be positioned about one foot from the ceiling. 6 - Wall Cove Lighting Cove lighting can be installed under a wall lip or trim and faced downward to shine on a wall. These fixtures are mainly used as accent lights because the bright lights would be too hard on the eyes when they are facing downward.
- 4. B- Valance lighting:- A method of indirect lighting, by concealing the fixture behind a suspended valance, whereby the light can be directedupw ard or downward. C-Cornice lighting Most types of cornice are installed with the purpose of softening the join between wall and ceiling. However, in recent years, up lighting cornice has become more and more popular, with the advent of low cost, energy efficient LED lighting and TV designer makeover shows. Styles of cornice for up lighting There are many sizes and profiles of up lighting cornice to suit differing room sizes and ceiling heights, from traditional Victorian cornice to match an older period property, to more modern and contemporary designs that will suit buildings undergoing a modern restoration. Again, cornice profile sizes can range from just a few centimeters in height and projection, to those which are nearly 30cm in height and which look terrific in a hotel lobby or restaurant. How to install up lighters securely It should be noted that only cornice specifically designed for use as an up lighter should be used since these have been purpose designed with a double fixing point to the wall and mounting lugs to hold the lighting. Normal coving or cornice patterns are not suitable for use as up-lighters. (Standard cornice is normally attached on the top edge to the ceiling and on the back edge to the wall. Trying to fix it by just the single wall mounting point will not give sufficient hold to prevent the cornice from pulling away.) Similarly an up lighting cornice or trough should be made in a material that is as light as possible, such as hardened high density polyurethane. Hanging a heavy run of plaster projecting from a wall is quite risky, as the natural inclination will be for gravity to pull it out and down. A large amount of mechanical fixing would be needed to fully secure the run. This is can be a time consuming process, whereas lighter materials will only require adhesive and minimal fixings.
- 5. D- Soffit lighting:- Soffit lighting refers to lighting systems directed mainly at planar surfaces rather than the whole room space. Lighting fixtures in corners and floors, often hidden from view, shine on walls and ceilings, providing partial lighting for the room through reflection. This is often used for atmospheric effects, especially in restaurants and theaters, and in rooms where dim lighting is desired. This soffit cross section illustrates the framing, wiring and trim details. You can build deeper or taller soffits, but it's important to make yours at least 8 in. high to leave enough room for mounting recessed lights. The lighting fixtures in our soffit are of two types: “rope” lighting for unobtrusive mood lighting and recessed soffit fixtures for specific lighting tasks. Rope lighting's all the rage among designers. It's cheap, and it can be cut to length for shorter runs or spliced together for longer ones. Special splicing connections and end caps make that easy. Measure the inner perimeter of the soffit to determine how much rope light you'll need. The home center will carry lengths from just a few feet to dozens of feet. E- Wall Bracket lighting:-
- 6. References: 1. http://www.ifinishedmybasement.com/framing-basement/framing-around- ductwork/ 2. http://www.bookeys.com/tag/valance-lighting-definition/ 3. http://www.slideshare.net/AZMAT0/lighting-systems-and-their-designmau- jmi2014 4. http://www.archlighting.com/projects/cove-lighting_o 5. Cove Lighting book 6. http://ledoux.en.alibaba.com/product/746723156- 215644106/Modern_design_2W_wall_mounted_led_wall_bracket_light_fitting. html