List of Standard Illuminance Stipulated by the State in Various Places

1. Lighting Standard value of Residential Building

Lighting standard value of room or place reference plane and its height illuminance standard value (Lx)  Ra

Location	Height (m)	illuminance standard	CRI (Ra)
General activities in the living room	0.75 Horizontal plane	100	80
Writing, reading	0.8 m	300	80
General activities in the bedroom	0.75m Horizontal level	75	80
Bedside the bed, Reading		150	80
Restaurant	0.75 m dining table	150	80
General activities in the kitchen	0.75m Horizontal surface	100	80
Toilet	0.75m Horizontal level	100	80

Note: Mixed lighting should be used.

 2. Lighting Standard value of Public buildings

  ★Commercial building lighting standard value

The reference plane of the room or place and the standard value of its height illuminance.

	height	Standard illuminance (Lx)	UGR	CRI (Ra)
General store business hall	0.75m Horizontal plane	300	22	80
High-end store business hall	0.75m Horizontal plane	500	22	80
General supermarket business hall	0.75m Horizontal plane	300	22	80
High-end supermarket business hall	0.75m Horizontal plane	500	22	80
Cashier	0.8m	500	/	80

★Standard value of library building lighting

The reference plane of the room or place and the standard value of its height illuminance

	Height	Standard illuminance (Lx)	UGR	CRI (Ra)
General reading room	0.75m Horizontal plane	300	19	80
Reading rooms of important libraries	0.75m Horizontal plane	500	19	80
Old age reading room	0.75m Horizontal plane	500	19	80
Rare books and book reading room	0.75m Horizontal plane	500	19	80
Showroom, catalog hall	0.75m Horizontal plane	300	19	80
Book stack	0.25m Horizontal plane	50	19	80
Workshop	0.75m Horizontal plane	300	19	80

 

★Standard value of office building lighting

The reference plane of the room or place and the standard value of its height illuminance

	Height	Standard illuminance (Lx)	UGR	CRI (Ra)
Ordinary office	0.75m Horizontal plane	300	19	80
High-end office	0.75m Horizontal plane	500	19	80
Meeting room	0.75m dining table	300	19	80
Reception room	0.75m Horizontal plane	300	/	80
Business hall	0.75m Horizontal plane	300	22	80
Actual working surface of design room	0.75m Horizontal plane	500	19	80
Document sorting, copying, publishing room	0.75m Horizontal plane	300	/	80
Data archive room	0.75m Horizontal plane	200	/	80

 

★Hotel building lighting standard value

Room or place  reference plane and its height standard value of illuminance

	reference plane and its height	standard value of illuminance (Lx)	UGR	Ra
Guest room	0.75m Horizontal plane	75	/	80
Bed head	0.75m Horizontal plane	150	/	80
Writing desk	table top	300	/	80
Toilet	0.75m Horizontal plane	150	/	80
Chinese restaurant	0.75m Horizontal plane	200	22	80
Western restaurants	0.75m Horizontal plane	100	/	80
Multifunctional meeting room	0.75m Horizontal plane	300	22	80
Foyer, general service desk	Ground	300	/	80
Lounge	Ground	200	22	80
Room floor corridor	Ground	20	/	80
Kitchen	Countertop	200	/	80
Laundry room	0.75m Horizontal plane	200	/	80

 

★Standard value of school building lighting

Room or place reference plane and its height standard value of illuminance

Room or place	reference plane and its height	standard value of illuminance (Lx)	UGR	Ra
Classroom	Class Desk	300	19	80
Laboratory	Experimental Desktop	300	19	80
Art classroom	desktop	500	19	80
Multimedia classroom	0.75m Horizontal plane	300	19	80
Classroom blackboard	Blackboard surface	500	/	80

 

★Hospital building lighting standard value

Room or place reference plane and its height standard value of illuminance

Room or place	reference plane and its height	standard value of illuminance (Lx)	UGR	Ra
Treatment room	0.75m Horizontal level	300	19	80
Laboratory	0.75m Horizontal level	500	19	80
Operating room	0.75m Horizontal level	750	19	80
Clinic	0.75m Horizontal level	300	19	80
Waiting room, registration hall	0.75m Horizontal level	200	19	80
Ward	Ground	100	22	80
Nurse station	0.75m Horizontal level	300	/	80
Pharmacy	0.75m Horizontal level	500	19	80
Intensive Care Unit	0.75m Horizontal level	300	19	80

★Standard value of lighting in exhibition halls

Room or place reference plane and its height standard value of illuminance

Room or place	reference plane and its height	standard value of illuminance (Lx)	UGR	Ra
General exhibition hall	Ground	200	22	80
High-end exhibition hall	Ground	300	22	80

Note: Ra for exhibition halls higher than 6m can be reduced to 60.

  ★Sports building lighting quality standard value

category	standard value of illuminance (Lx)	UGR	Ra
No color TV broadcast	750	50	65
Color TV broadcast	1000	50	80

Note: The GR value is only applicable to outdoor sports venues.

Super Bowl illuminated with LED lights

Football fans will see the Super Bowl in a new light this year.

 

The football championship scheduled for Feb. 1 will be the first ever played in a dome illuminated by LED lights, which officials say will make for more vivid images on television.

 

“It’s the brightness, it’s the clarity, you can see the grain of the football, you can see (everything) with much greater detail,” said Mike Lorenz, president of Ephesus Lighting Inc.

 

Behind the scenes, the LED lights installed in the fall translate to using far less energy to light up and cool down the playing field.

 

To those watching the game in person and on TV, the lighting will create a different, more vivid visual experience, Lorenz said.

 

“From a visual standpoint, it is excellent, it is excellent for slow motion, HDTV,” said Scott Norton, director of marketing and public relations for Global Spectrum at University of Phoenix Stadium.

 

Norton said he did not have figures on how much it cost to replace 780 metal halide fixtures at the stadium with 312 Ephesus Stadium Pro fixtures. The new lights, he said, use 310,000 watts of energy compared with 1.24 million watts needed to power the previous system.

They also emit far less heat, which means the stadium uses far less energy to cool down the dome, Norton said.

 

“We researched it extensively,” he said. “We are not the first sports facility that has converted to an LED system. It’s really a no-brainer when you look at the technology and what it does. LED is the way of the future.”

 

Norton said he did not know the monthly electricity costs for the stadium, how much the LED lights are saving the stadium, or how much it will cost to light up the Super Bowl.

However, Salt River Project announced recently it will provide $50,000 in energy to light the Super Bowl with electricity from wind power, providing an estimate of electricity costs for a game.

 

LEDs, or light-emitting diodes, are semiconductor devices that produce visible light when an electrical current passes through them, according to energystar.gov, which is produced by the Environmental Protection Agency.

 

The focused beams of LED light create a more uniformly lit field, according to Ephesus Lighting. The increased level of light will produce less glare and reduce unwanted shadows, allowing fans to see more, according to the company.

With the old lighting, television cameras were forced to keep apertures open all the way to provide enough light, according to a company press release. But with LED lighting, “NBC will be able to reduce the aperture size, and increase the focal plane, providing more depth of field and more detail,” Ephesus said.

 

“The 2015 Super Bowl will absolutely set a new standard for players and spectators,” Joe Casper, Ephesus Lighting founder and chief technology officer, said in a prepared statement.

LED lights use at least 75 percent less energy than incandescent lighting, saving on operating expenses, according to energystar.gov. The lights last 35 to 50 times longer than incandescent lighting and reduce cooling costs.

 

“I think it’s important that the University of Phoenix stadium has the vision of sustainability to do this,” Lorenz said.