daylight analysis and detail

DAYLIGHT AND ARTIFICIAL LIGHTING EXERCISE DESIGN INTENTIONS A 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 DESIGN The space would be used as gallery. With paintings or “flat” 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.

KEITH CHAN WSA2 DAYLIGHT DESIGN FOR GALLERY SPACE

Materials have been decided with more heavymass concrete and the wall installed with lightwell initially would be rendered 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 flooring

DAYLIGHT AND ARTIFICIAL LIGHTING EXERCISE DIGITAL DAYLIGHT ANALYSIS

ARTIFICIAL LIGHTING AT NIGHT

KEITH CHAN WSA2

I have changed the materials of the floor to a darker rubber surface, that makes the room becoming darker visually - that is why I have decided to compensate the light levels with wall washers from the floor, 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 insufficient lux levels as I desired (mostly 15-30lx) compared to 50lx. HOWEVER, there is the implication that the light meter which were taking readings on a flat 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 floor level.

The artificial 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 March 21 900-1200-1600

KEITH CHAN WSA2

CONCLUSION FINAL RENDERED IMAGE

June 21 900-1200-1600

December 21 900-1200-1600

Daylight system was manipulated in its perimeters so we can produce digital 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 suffer 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.

This is the final rendered “impact” image of the space. As you can see there is a big difference 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 looking 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.

KEITH CHAN WSA2

DETAIL AND 3D SECTION Zinc sheet covering DPM under

Skylight - Double Glazed Window Prefabricated concrete roofing elements to cover DPM & L-shape blocks to form lightwell Detailed section Not to scale

Insulation Concrete loadbearing ceiling

150mm Granolithic Concrete Insulation Outer wallConcrete blockwork

Prefacbricated construction.