Product Application Guideline

Philips Cove-LED Lighting Solutions

- LiDAC guide for internal use only -

Date: 12/03/09 - Project reference: 2009039Author: Chia-Chun LiuAll rights reserved 2- LiDAC guide for internal use only -

IntroductionCove lighting is a clever method of lighting application that brings out the essence of an architectural space. It is frequently used to create the perceptual eff ect of glowing edges, indirect soft lighting and surface illuminations. The luminaires are hidden behind a panel, or an alcove construction; therefore, one does not see the luminaire but the pleasant lighting eff ect produced by the luminaires.

With all the products that are currently in the range, how does one identify which is right luminaire for his lighting installation?

The objective of the study is to produce an application guideline that helps users to select the most suitable Philips Cove-LED products for indoor alcoves and wall glow-ing situations.

I hope that this document would serve as a concise and useful "tool", which one could often refer to when creating spectacular interior spaces that utilize cove lighting.

Chia-Chun LiuLiDAC International

Date: 12/03/09 - Project reference: 2009039Author: Chia-Chun LiuAll rights reserved 3- LiDAC guide for internal use only -

Contents

1. Selected luminaire family 4

2. Testing methodology 5

3. Test I: Inter-reflecting light in a cove 6

3.1 Cove Test layout .............................................. 7

3.2 Observation ....................................................... 8-9

3.3 Rule of thumb for luminaire selection .......... 10

3.4 Glow distance in relation to surrounding

lighting level ......................................................... 11

3.5 Cove lighting visual documentation .............. 12

4. Test II: Wall washing effect 13

4.1 Wall washing test layout ................................ 14

4.2 Observation ....................................................... 15-16

4.3 Wall washing visual documentation .............. 17

Date: 12/03/09 - Project reference: 2009039Author: Chia-Chun LiuAll rights reserved 4- LiDAC guide for internal use only -

1. Selected luminaire family

iColor Cove MX Powercore 70x70

iColor Cove MX Powercore 20x60 iColor Cove QLX 100x40

40100

IColor Cove QLX 120x120

120 120

eW Cove Powercore 120x120 Warm White 2800KeW Cove Powercore 120x120 Cool White 4200K

120 120

iColor Cove EC 120x120

120 120

RGB

White

Allows color temperature changes

iW Cove Powercore 20x30x60

20

30

60

iW Cove Powercore 50x50

50 50

Color temperature changing possibilities

Date: 12/03/09 - Project reference: 2009039Author: Chia-Chun LiuAll rights reserved 5- LiDAC guide for internal use only -

2. Testing methodologyCove lighting is generally applied in 2 ways:

1. Inter-refl ecting light in a cove. (A)

2. Wall glowing eff ect. (B) Luminaire is hidden behind, for instance, a panel so one does not directly see the light source.

(A)

Test I: Inter-refl ecting light in a coveThe objective of the tests is to investigate how the

* surrounding lighting level* cove dimension* aiming of the luminaire

infl uence the brightness and intensity of the cove light-ing eff ect. With such information, one is able to select the appropriate luminaires that best suit one's lighting scheme.

(B)

Test II: Wall glowing eff ectThe objective of the tests is to investigate how the

* surrounding lighting level* luminaire position* aiming of the luminaire

infl uence the brightness and intensity of the lighting eff ect. Visual documentation of the result would be provided as a reference that helps users discern the most suitable products for his lighting projects.

Date: 12/03/09 - Project reference: 2009039Author: Chia-Chun LiuAll rights reserved 6- LiDAC guide for internal use only -

3. Test I: Inter-reflecting light in a cove

Date: 12/03/09 - Project reference: 2009039Author: Chia-Chun LiuAll rights reserved 7- LiDAC guide for internal use only -

3.1 Cove test layout

Model

Adjustable cove at 2.7 m height (a)

4 Efix Recessed (b)

Illuminance measurment point (c)

Room height: 3 mWall reflectance factor: 0.86

A

C

B

Luminaires in question were placed in alcoves of two dimensions. (A, B)

Test layout plan: (C)

An adjustable acove of 1.2 m long was mounted on the height of 2.7 m. (a)

Surrounding lighting level was produced by 4 Efi x Recessed with 4 TL5 14W fl uorescent lamps and high gloss aluminum optics with 3D lamellae,1.6 m from the wall, on a 3m high ceiling. (b)

Surrounding lux values were measured on the ground level, 1.5 m away from the wall (horizontal). (c) The 5 increasing steps of lux values are: 0, 100, 300, 500, 750 lux.

Height of the space: 3m.

Wall refl ectance factor: 0.86.

Luminance gradient measurement is 10 cm in increment.

Date: 12/03/09 - Project reference: 2009039Author: Chia-Chun LiuAll rights reserved 8- LiDAC guide for internal use only -

3.2 Observation

When placing a luminaire inside a cove, the diff erence of beam angles of the same luminaire does not alter the lighting impression signifi cantly because of the inter-refl ection from the cove itself.

Asymmetrical BeamiW Cove Powercore 20x30x60 Cove opening: 20cmSurrrounding: 100 Eh

Medium BeamiW Cove Powercore 50x50 Cove opening: 20cmSurrrounding: 100 Eh

Wide BeamiColor Cove QLX 120x120 Cove opening: 20cmSurrrounding: 100 Eh

Medium BeamiColor Cove QLX 100x40 Cove opening: 20cmSurrrounding: 100 Eh

Narrow BeamiColor Cove MX Powercore 20X60 Cove opening: 20cmSurrrounding: 100 Eh

No OpticiColor Cove MX Powercore 70x70Cove opening: 20cmSurrrounding: 100 Eh

Diff erent beam angle, similar cove lighting eff ect

Date: 12/03/09 - Project reference: 2009039Author: Chia-Chun LiuAll rights reserved 9- LiDAC guide for internal use only -

3.2 Observation

Smaller cove openingiW Cove Powercore 20x30x60 Cove opening: 20cmSurrrounding: 100 Eh

Larger cove openingiW Cove Powercore 20x30x60 Cove opening: 30cmSurrrounding: 100 Eh

Smaller cove openingiW Cove Powercore 50x50 Cove opening: 20cmSurrrounding: 100 Eh

Larger cove openingiW Cove Powercore 50x50 Cove opening: 30cmSurrrounding: 100 Eh

Larger coveopeningiColor Cove QLX 100x40 Cove opening: 30cmSurrrounding: 100 Eh

Smaller cove openingiColor Cove QLX 100x40 Cove opening: 20cmSurrrounding: 100 Eh

Smaller cove openingiColor Cove MX Powercore 70x70 Cove opening: 20cmSurrrounding: 100 Eh

Larger cove openingiColor Cove MX Powercore 70x70Cove opening: 30cmSurrrounding: 100 Eh

Larger cove opening, slightly further and smoother glow

Cove aiming variations

iColor Cove MX Powercore 20x60 Cove opening: 20cmSurrrounding: 500 Eh

iW Cove Powercore 50x50 Cove opening: 20cmSurrrounding: 500 Eh

Luminaires aiming at this direc-tion generate harsh, limited sized glow.

The recommended cove-opening is between 20-30cm, with luminaire aiming upward. Adjusting the aiming to get the desired luminu-ous gradient.

Date: 12/03/09 - Project reference: 2009039Author: Chia-Chun LiuAll rights reserved 10- LiDAC guide for internal use only -

The result of the cove test (p.8) shows that, When placing a luminaire inside a cove, the diff erence of beam angles of the same luminaire does not change the lighting eff ect signifi cantly because of the inter-refl ection from the cove itself.

Up to 750 Eh

iColor Cove MX Powercore

Up to 75 Eh

iColor Cove EC

Up to 350 Eh

iW Cove Powercore eW Cove Powercore

Up to 450 Eh

iColor Cove QLX

3.3 Rule of thumb for luminaire selection

RGB

White

Color temperature changing possibilities

Therefore, to simplify the selection pro-cess, a general rule of thumb for a cove situation is such:

When surrounding lighting level is:

Date: 12/03/09 - Project reference: 2009039Author: Chia-Chun LiuAll rights reserved 11- LiDAC guide for internal use only -

0 100 300 500 750

Surrounding Lux Level (Eh)

Dis

tanc

e of

Glo

w (

cm)

0

10

20

30

40

50

60

70

80

RGB Luminaire Glow Distance

A

CB

ED

A iColor Cove EC 120x120B iColor Cove QLX 100x40C iColor Cove QLX 120x120D iColor Cove MX Powercore 20x60E iColor Cove MX Powercore 70x70

0 100 300 500 750

Surrounding Lux Level (Eh)

Dis

tanc

e of

Glo

w (

cm)

0

10

20

30

40

50

60

70

80

White Luminaire Glow Distance

H

F

G

F iW Cove Powercore 50x50G iW Cove Powercore 20x30x160H eW Cove Powercore 120x120

The following is the result of glow size in relation to sur-rounding lighting level when placing luminaires inside a cove opening between 20-30 cm, aiming upward. The chosen light color is red.

The result may vary slightly when applying diff erent light colors.

3.4 Glow coverage in relation to surrounding lighting level

Date: 12/03/09 - Project reference: 2009039Author: Chia-Chun LiuAll rights reserved 12- LiDAC guide for internal use only -

3.5 Cove lighting visual documentationiColor Cove EC

0 lux 100 lux 300 lux 500 lux 750 lux

iColor Cove QLX

0 lux 100 lux 300 lux 500 lux 750 lux

iColor MX Powercore

0 lux 100 lux 300 lux 500 lux 750 Lux

iW Cove Powercore

0 lux 100 lux 300 lux 500 lux 750 lux

eW Cove Powercore

0 lux 100 lux 300 lux 500 lux 750 lux

Here is an overview of lighting impressions when the surrounding lux value increases.

Date: 12/03/09 - Project reference: 2009039Author: Chia-Chun LiuAll rights reserved 13- LiDAC guide for internal use only -

4. Test II: Wall glowing effect

Date: 12/03/09 - Project reference: 2009039Author: Chia-Chun LiuAll rights reserved 14- LiDAC guide for internal use only -

Luminaires in question were placed on the ground, 0 cm, 5 cm, and 10 cm away parallel from the wall, aiming up. (a)

Surrounding lighting level was produced by 4 Efi x Recessed with 4 TL5 14W fl uorescent lamps and high gloss aluminum optics with 3D lamellae,1.6 m from the wall, on a 3m high ceiling. (b)

Surrounding lux values were measured on the ground level, 1.5 m away from the wall (horizontal). (c)

3 increasing steps of lux values are: 200, 500, 750 lux.

Height of the room is 3m.

Wall refl ectance factor is 0.86

Luminance gradient measurement is 10 cm in increment.

Illuminance measurment point (c)

4 Efix Recessed (b)

Luminaire (a)

Room height: 3mWall reflectance factor: 0.86

4.1 Wall glowing test layout

(a)

Date: 12/03/09 - Project reference: 2009039Author: Chia-Chun LiuAll rights reserved 15- LiDAC guide for internal use only -

4.2 Observation

When placing luminaires too close to the wall, for example, less than 5 cm, one sees individual light sources instead of a smooth wall wash. In the case of RGB luminaires, the color light sources do not blend smoothly at the source of the luminaire.

The eff ect of the wall wash is smoother and goes further in distance when keep-ing the luminaires at the minimum of 10 cm from the wall. This also insures good color blending as well as prevent harsh hot spots near the source of the luminaire.

Place luminaires at the minimum of 10 cm from the wall

Directly against the wall iW Cove Powercore 20x30x160Surrrounding: 200 Eh

5 cm from the walliW Cove Powercore 20x30x160Surrrounding: 200 Eh

10 cm from the walliW Cove Powercore 20x30x160Surrrounding: 200 Eh

Directly against the wall iColor Cove MX Powercore 20x60Surrrounding: 200 Eh

5 cm from the walliColor Cove MX Powercore 20x60Surrrounding: 200 Eh

10 cm from the walliColor Cove MX Powercore 20x60Surrrounding: 200 Eh

Date: 12/03/09 - Project reference: 2009039Author: Chia-Chun LiuAll rights reserved 16- LiDAC guide for internal use only -

4.3 Observation

Aiming iColor Cove MX Powercore Luminaires

15°

10 cm from the wall tilt 15º iColor Cove MX Powercore 20x60Surrrounding: 200 Eh

10 cm from the wall tilt 15º iColor Cove MX Powercore 70x70Surrrounding: 200 Eh

10 cm from the wall no tiltiColor Cove MX Powercore 20x60Surrrounding: 200 Eh

10 cm from the wall no tilt iColor Cove MX Powercore 70x70Surrrounding: 200 Eh

iW Cove Powercore Luminaires

15°

10 cm from the wall tilt 15º iW Cove Powercore 20x30x60Surrrounding: 200 Eh

10 cm from the wall tilt 15º iW Cove Powercore 50x50Surrrounding: 200 Eh

10 cm from the wall no tilt iW Cove Powercore 20x30x60Surrrounding: 200 Eh

10 cm from the wall no tiltiW Cove Powercore 50x50Surrrounding: 200 Eh

iColor Cove QLX Luminaires

15°

10 cm from the wall tilt 15º Surrrounding: 200 Eh

10 cm from the wall tilt 15º iColor Cove QLX 120x120Surrrounding: 200 Eh

10 cm from the wall no tiltiColor Cove QLX 100x40Surrrounding: 200 Eh

10 cm from the wall no tiltiColor Cove QLX 120x120Surrrounding: 200 Eh

With certain products, the aiming of the luminaire changes the lighting impression signifi cantly (for example, the iColor Cove QLX products); however, with most of the other cove luminaires in the range, the diff er-ence is quite subtle.

A general recommenda-tion for a startindg point is to install the luminaire aiming parallel to the wall. Adjusting the tilting of the luminaire on site to reach the desired luminu-ous gradient.

Date: 12/03/09 - Project reference: 2009039Author: Chia-Chun LiuAll rights reserved 17- LiDAC guide for internal use only -

4.4 Wall glowing visual documentationThe following is a visual data of the lighting eff ect in relation to 3 surrounding light levels (200, 500, 750 lux) when placing luminairs 10 cm from the wall, no tilting.

The recommanded luminaire distance from the wall is 10 cm, aiming parallel to the wall. Adjusting the aiming can alter slightly the glow distance and lighting intensity according to the desired eff ect.

iColor Cove MX Powercore

MX 20x60200 lux 500 lux 750 lux

MX 70x70200 lux 500 lux 750 lux

iColor Cove QLX

QLX 100x40200 lux 500 lux 750 lux

QLX 120x120200 lux 500 lux 750 lux

iColor Cove EC

EC 120x120200 lux 500 lux 750 lux

eW Cove Powercore

eW 120x120 2800K200 lux 500 lux 750 lux

iW 20x30x160

iW Cove Powercore

iW 50x50 iW 50x50 200 lux 500 lux 750 lux 200 lux 500 lux 750 lux

iW 20x30160

All rights strictly reserved. Reproduction or issue to third parties in any form whatever is not permitted with-out written authority from the proprietor

All visualization materials, such as pictures, stills, graphics, videos and real-time renderings, included in or refer-enced to in this publication, have been prepared by Philips with the greatest care to simulate lighting effects on a particular project. The real measured values may vary due to tolerances on luminaires, luminaires positioning, reflection properties and electrical supply. Philips disclaims any and all claims with respect thereto.

Chia-Chun LiuPhilips LightingBuilding EDW 6.18P.O. Box 800206500 JM EindhovenThe Netherlands

Tel +31(0)40 27 56623Fax +31(0)40 27 55400

Date: 12/03/09Project reference: 2009039

- LiDAC guide for internal use only -