H... DAY 4 WINNER - Mick Searle won the excellent PET720 -PHILIPS 7" PORTABLE DVD PLAYER, courtesy of Philips. If your light bounces back off a mirror, it appears brighter and increases the utilization factor of that particular room. Determine number of luminaires required in this office. Utilization Factor or Co-efficient of utilization. The maintenance factor is based on how often the lights are cleaned and replaced. right? Apply Energy Efficiency and Sustainability filter, Apply Smart Homes & Building Automation filter, Distribution Equipment including Cable Management, Electrical Heating, Ventilation & Control, Getting connected – lighting beyond illumination, as Philips shows, Part L 2013 – Consultation – a retrospective on lighting by Philips, Part L 2013 – consultation – a retrospective from Philips Lighting, Voltimum Advent Calendar 2006- 4th December, sponsored by Philips, Philips explains how to check that LEDs are up to standard, eHiD Flat Outdoor Xtreme- Philips Lighting Spring Collection 2013, Philips floodlighting projects honoured at Lighting Industry's EMILAS Awards 2010, Philips says that lighting should be the first choice for energy efficiency and cutting carbon, Energy Efficiency and Sustainability (12). An office has length of 20m, width=10m,height=3m. Utilisation factor table philips: Fold table lamp black 2x6.5W 18V. 70% reflectance for ceiling, 50% for wall and 20% for floor (General standard for white/light coloured walls) For R.I. = 1.8 and reflectance code = 752, Utilization Factor(U.F) = 0.66. London, UK: Royal Philips Electronics (AEX: PHI, NYSE: PHG) has been honoured with 2 awards for external lighting projects at the Lighting Industry Federation’s EMILAS Awards Ceremony held on November 17th 2010. IMPORTANT DEFINITIONS IN ELECTRICAL LIGHTING DESIGN: The following are some of the definitions which we come across in the design of electric lighting scheme. As LEDs rapidly become the light source of choice, it’s important for installers and wholesalers to have confidence in the products they choose. It may be defined as “the ratio of total lumens received on the working plane to the total lumens emitted by the light source”.i.e. It's very engaging. UTILISATION FACTOR TABLE FOR SHR Room = 1.5. It is given by: Where L is the length of the room, W is its width, and Hm is the mounting height above the work plane. It’s value varies from 0.5 to 1, 6)     LUMINOUS EFFICIENCY OR SPECIFIC OUT PUT, It may be defined as “the ratio of number of lumens emitted to the electric power in take of a source” it’s unit is lumen/watt (lm/W), 7)     SPACING TO MOUNTING HEIGHT RATIO (SHR). 4) Maintenance factor is 0.63, Utilisation factor is 0.69, The office measures 10*7 m with a floor to ceiling height of 3m. Office is being used for general office duties including some computer use. Maintenance factor: 1.0 Ceiling mounted UGR diagram 4.0 4.0 8.0 8.0 12.0 12.0 16.0 16.0 m m X Y h : 2.8 m Refl: 0.70 0.50 0.20 Ceiling mounted: viewed endwise: viewed crosswise Y: Parallel to viewing dir. The utilization factor tables are useful for determining the number of luminaires of the same kind to be used within the room given an average illuminance value. Hence absorption factor may be defined as “the ratio of net lumens available on the working plane after absorption to the total lumens emitted by the lamp”. Checking they comply with the relevant standards is a good start, suggests John Gorse of Philips Lighting: A new generation Xtreme product family with an improved behaviour and a reliable future in terms of new innovations. Determine Minimum spacing between luminaire, 6. Elements in the Table Reflectance factors: these are the reflectance factors of the ceiling, frieze, walls and work plane and are to be considered as percentages multiplied by 10 (example 80%, 70%, 70% and 30%) 2) Area to be illuminated to a general is 250 lux using twin lamp 32 watt CFL Luminaire with a SHR of 1.25. D.F = Illumination under normal working conditions / Illumination when everything is clean. The reflectance factor table in the system helps you determine the reflectance factors. In our increasingly connected world, lighting systems have a pivotal role to play that goes far beyond illumination. SHR= Space to … For example, Table -2 gives the utilization factor UF for a fluorescent luminaire with single 40W lamp and prismatic diffuser0011 mm length for different values of the room reflection coefficients: C – ceiling reflection, W- wall reflection, F- floor reflection. Utilization factor =Lumens received on the working plane/Lumens emitted by the lamp, Type of light, light fitting, Colour surface of walls and ceiling, mounting height of lamps, Area to be illuminated, Its value lies between 0.4 and 0.6 for direct fittings it varies from 0.1 to 0.35 for indirect fittings, 2)     Depreciation or Maintenance factor. 3) Each lamp has an initial output of 85 lumen per watt. Minimum spacing = SHR * Hm. Fold table lamp aluminium 2x6.5W 18V. Product tests and other information of over 20 partners in the industry. It may be defined as “the ratio of illumination under normal working condition to the illumination when everything is clean or new” i.e. Darker colors do the opposite and draw in light, making rooms seem … Getting connected – lighting beyond illumination, as Philips shows. The working plane height is 0.8m. Reflective surfaces affect the utilization factor because they increase the brightness of lighting. Read more abut Mick > >. Darren Smith of Philips Lighting explains: Consultation, Consultation, Consultation… the British are renowned worldwide for their embracing of this notion in Government. 'Exciting' - 'Appealing' - 'Inviting' - 'New' - 'Different' - all these are ingredients for a successful lighting solution. For Classroom/Office Maintenance Factor = 0.8 (Standard) Where N = Number of luminaire required for given area. Hm= Mounting height. Its value will be between 1.2 to 1.5, It may be defined as “the ratio of luminous flux leaving the surface to the luminous flux incident on it”. It takes into account such factors as decreased efficiency with age, accumulation of dust within the fitting itself and the depreciation of reflectance as walls and ceilings age. 23/01/2015. And in Approved Document L (ADL) or Part L of the Building Regulations as its better known, John Gorse – Technical Marketing Manager – at Philips Lighting finds no except... Consultation, Consultation, Consultation….the British are renowned worldwide for their embracing of this in Government - and in Approved Document L (ADL) or Part L of the Building Regulations, as it is better known, John Gorse, Technical Marketing Manager at Philips Lighting finds no exception. Reflectance code for classroom = 752. i.e. UF= utilisation factor, MF= maintenance factor, 5. And here's some amazing content. The room index is a ratio, describing how the room's height compares to its length and width. Technical Articles. The lighter the color of paint on your walls, the more reflective it is. If these values are: (0.5, 0.5, 0.2) and the room index is calculated to be 1.50, then the UF = 0.52. For convenience, it is usually given as three options: When a surface is illuminated by a number of lamps, there is certain amount of wastage due to overlapping of light waves. E   =          illuminance level required (lux), A  =          area at working plane height (m2), F   =          average luminous flux from each lamp (lm), 5. Determine Number of required rows of luminaire along width of the room, Number of required rows= width of the room/ Minimum spacing, 7. It’s value will be always less than 1, When the atmosphere is full of snow or smoke fumes, it absorbs some light. Determine Number of luminaire in each row, Number of luminaire in each row= Total luminaire / Number of rows, Axial spacing= Length of the room/ Number of luminaire in each row, Transverse spacing = Width of the room/ Number of luminaire in each row. The Spacing to Mounting Height Ratio (SHR) is the spacing between luminaires divided by their height above the horizontal reference plane. Determine Minimum spacing between luminaire. In our increasingly connected world, lighting systems have a pivotal role to play that goes far beyond illumination. Reflective surfaces include mirrors, glass and wall paint.


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