Utilisation factor for fluorescent luminare with single 40w lamp and prismatic diffuser 0011 mm length. 5 table 3 gives the maintenance factors for different types of rooms.
It is proposed to illuminate a class room of dimensions 6 x 8 x 285 m to an illuminance e of 400 lx at the bench level.
Room index table for lighting. Although this is the basic approach for an average household room but its not practically accurate. The simple and basic approach for calculating the lighting requirement is to divide the total light requirement of the room by light output lumen provided by a single lamp. Using the room index and reflectance values in the utilisation factor table.
For the horizontal row select the reflectance that best describes the room. Infuse a beautifully rustic ambiance over a dining. The utilisation factor for this fitting in this room is where the row and column intersect.
The simple elegant metal frame of this tasteful two tiers nine light chandelier will bring classic yet modern appeal to any room. Find required lux level. For an eco friendly lighting solution warm dim led fixtures and led bulbs save energy while offering the same comforting amber glow of halogen and incandescent light sources when dimmed.
The length of your table will be important so your can measure the light hitting it. Draw a line down from your dining room table top at a 90 degree to the floor line representing the table end. Infuse a beautifully rustic ambiance over a dining area or kitchen space with this industrial eight light island chandelier.
To improve your dining room decor use dimmers with your chandeliers pendants or ceiling lights to create a more comfortable space and reduce glare over the table. Most dining tables are 30 inches or 2 12 ft high so you would want to make another horizontal line showing your table. For the vertical column select the room index value k as calculated above.
Where l is the length of the room w is its width and hm is the mounting height above the work plane.