DAYLIGHT AND ARTIFICIAL LIGHTING EXERCISE KEITH CHAN WSA2

DESIGN INTENTIONSA dark gallery space with highlighted wall of exhibits. One side of the room would be quite bright, with quite a glossy concrete wall and the other side would be lit but dim, to show the texture of the rough concrete wall. The pallette would be mainly concrete and metal.

USE OF SPACE & QUANTITATIVE LIGHTING DESIGNThe space would be used as gallery. With paintings or “�at” exhibits that can be hung up on the wall on the left, whereas the right wall would be dark enough for projecting video artwork.I aim to create the gallery space to be intimate enough so the average lux level would be around 50-80 lx - so similar to a family living room.

The gallery modelled physically using cardboards.

DAYLIGHT DESIGN FOR GALLERY SPACEMaterials have been de-cided with more heavy-mass concrete and the wall installed with light-well initially would be ren-dered with a more glossy white surface. However, there may be too much glare for the artwork. Therefore I then changed it to a more matt surface to reduce shine.

One iteration of using matt surfaces but glossy �ooring

DAYLIGHT AND ARTIFICIAL LIGHTING EXERCISE KEITH CHAN WSA2

DIGITAL DAYLIGHT ANALYSIS I have changed the materials of the �oor to a darker rubber surface, that makes the room becoming darker visually - that is why I have decided to com-pensate the light levels with wall washers from the �oor, to shine light on the walls and the ramp edges. Then this setting is analysed.The image on the left shows the light meter readings - as expected the lux levels are higher on the left (where light well and the skirting gap along the ramp is) with about 600lx maximum. However on the left it seemed to have insu�cient lux levels as I desired (mostly 15-30lx) compared to 50lx. HOW-EVER, there is the implication that the light meter which were taking readings on a �at plane at the top of the ramp would not be the same level of light level that we would experience as we ascend in the gallery, since it would be compensated by the wallwashers at �oor level.

ARTIFICIAL LIGHTING AT NIGHTThe arti�cial lighting involves the installation of spotlight that shines on the wall with exhibits; and the wallwashers on the right on the more textured wall.From the pseudo light image we could see where the “hotspots” of lights are mapped. The lighting of the room is quite extreme in the case that most surfaces were dim and there is potential glare as a result from the spotlights on the wall. Perhaps a more even lighting strategy is needed so it would be more pleasant to be in.

DAYLIGHT AND ARTIFICIAL LIGHTING EXERCISE KEITH CHAN WSA2

This is the �nal rendered “impact” image of the space. As you can see there is a big di�erence in light qualities within one room, with dark on one side and very bright on the other. Quantitatively it proves that the space on the right side of the image may be too dark however by look-ing at it visually we only sensed it being a “moody” space with heavy and dense feelings of the materials. The use of spotlight at night seemed very successful in creating the same sort of lighting gathered from the light-well.

June 21 900-1200-1600

December 21 900-1200-1600

March 21 900-1200-1600CONCLUSION

FINAL RENDERED IMAGE

Daylight system was manipulated in its perimeters so we can produce dig-ital model of the space relatively accurately based on its location (London, UK was selected) and key dates of the solar calendar was selected to see if the gallery su�er any big change. The result, as we can see, represents a truely uniform condition throughout the year and it seems only the window at the far end of the gallery changes colour depending on the sky overcast condition. It shows that the light well on the left performs very well as it collects and bounces a constant stream of light no matter where the sun position would be. There is limited variety data from this test to comment on any key and relevant points in conclusion.

DETAIL AND 3D SECTION KEITH CHAN WSA2

Zinc sheet coveringDPM under

Outer wall-Concrete blockwork

Insulation

150mm GranolithicConcrete

Skylight - Double GlazedWindow

Prefacbricated construction.

Prefabricated concrete roo�ng elements to cover DPM &L-shape blocks to form lightwell

Insulation

Concrete load-bearing ceiling

Detailed sectionNot to scale