108 TECHNOLOGY / DESIGN SOFTWARE
Luxworks Luxworks
Luxoworks is an online luminaire product database with an integrated 2D planning tool. Users can view all data online without having to install any special software. The online platform gives anyone involved in a project, from architects through electrical and light engineers to developers 24/7 access to real-time planning information. After selecting the required fixture, it can be placed directly into a project blueprint.
www.luxoworks.com
EXPERT OPINION What the lighting designers say
“For advance daylighting calcula- tions we use Radiance and Daysim and for day-to-day calculations (artificial and daylighting) we use DIALux. We’ve found DIALux easy to use and sufficiently accurate. If we need to quantify the artificial lighting in complex structures (if we can’t do it with DIALux), we use Radiance.” Onur Sunguroglu, Inverse Lighting Design.
DAYSIM Daysim
DAYSIM is a validated daylighting analysis software that calculates the annual daylight availability in arbitrary buildings based on the Radiance backward raytracer. It uses the Lightswitch occupant behaviour model to mimic occupant use of personal controls such as light switches and venetian blinds and to predict energy savings from automated lighting controls such as occupancy sensors and photocell controlled diming systems. For design explorations, DAYSIM calculates a series of climate-based daylighting metrics including daylight autonomy and useful daylight illuminance. It can also be used to carry out an annual glare annalysis of daylit scenes using the daylight glare probability concept. DAYSIM
ReluxSuite 2011.3 Relux Informatik AG
automatically generates hourly schedules for occupancy, electric lighting loads and shading device status. These schedules can be directly coupled with popular thermal simulation programs such as TRNSYS, EnergyPlus, eQuest and Esp-r for an integrated lighting-thermal simulation. DAYSIM has been linked to a series of CAD environments including Rhinoceros, Autodesk-Ecotect and Google Sketch Up.
www.daysim.com
“I’d warn against over-reliance on any lighting calculation software. Not only is it reliant upon the cor- rect data being inputed (often the lighting designer may not have all the details as the interior design may be in a state of flux) it can lead to designers actually designing with the software. This is a danger- ous way to design as it removes the creativity and subtlety that a skilled designer has. Coming from a theatri- cal background I’m a firm believer in understanding the ‘feel’ of light within a space and you simply don’t get that from an electronic calcula- tion. That said, any piece of soft- ware is a useful tool to check and analyse the design. We do try and avoid photorealistic renders (which probably bucks the trend) as we’ve sat in meetings discussing the colour of carpets and style of furniture instead of lighting because the client can’t ‘see’ the light. I think this is because of the intangibility of light; our artwork tries to make the light ‘tangible’.” Paul Nulty, Paul Nulty Lighting Design.
The new version of ReluxSuite is more powerful than its predecessor: the depiction of textures in the 3D luminance view has been greatly improved; the brightness control for the 3D luminance now reacts immediately to changes; and the background colour for the 3D luminance can be freely selected.
One change is that windows and doors are
now cut out on external walls, making it possible to see through windows. The embrasures are generated automatically. The calculation of the degree of compliance for daylight in ReluxEnergy CH has been enhanced for MINERGIE-ECO certification and the addition of traditional Chinese and Japanese options means 25 languages are now available.
www.relux.biz
“In general, most lighting calcula- tion programs, for example Dialux, are very helpful when it comes to providing quick calculations on light- ing levels and a general 3D view of the space. However, the problem lies in the actual accuracy of both numerical figures and 3D realistic values. There are times when the same model (no changes made) gen- erates different results. This results in having to build another model to confirmation previous results.” - Gene Cheng, TKLC.
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