Need your Advise - Urgent (Sports Hall Project)

Sam, I would argue that a multipurpose sports arena is not a "Gymnasium/Exercise Center". Other than the Seating Area for Sports arena, this kind of lighting is not regulated and is therefor a process load. It has to do with minimum lighting levels required by HD Television Cameras, Slow-motion cameras and regulations by organisations such as FIFA. Be warned that certifying facilities with high process loads is hard, because they destroy energy...loads of it.

I ran into a similar situation with a v4 project. There are more space types in 90.1-2010 that make more sense for sports facilities like that, such as separating the audience seating area from the court sports. We were also able to apply the room cavity ratio adjustments. Maybe see if they would allow you to use those parts from 90.1-2010.

I disagree with the regulation of this lighting. 1. I think the baseline is 2.3 W/sf for court sports area under Sports Arena and this lighting is regulated and therefore not a process load. Lighting in the media room for cameras is probably not-regulated and is a process load. 2. You can't get an exception for excluding any energy use associated with the project. It is either regulated or not, if not it is a process load and must be included. You must meet the minimum savings or you can't earn LEED certification. 3. There is no exception. The good news is that you can go over the interior lighting power density and show a negative savings for lighting (this is not mandatory). You will just have to make up for it elsewhere.

I'm glad you caught that. I also think it is regulated as a sport arena, but not the playing field space itself...right? Obviously as a building method it is regulated.

The court area (badmiton, basketball, volleyball, etc.) is included in this allowance under space-by-space at 2.3 W/sf. If it was a play field (football) the allowance is 1,.4 W/sf. The seating area would be separate at 0.4 W/sf under audience seating for a sports arena. The office would be 1.1 W/sf and the media room is probably multipurpose at 1.3 W/sf for the general illumination system and the camera lights are process.

Ah yes. I turned the page and there it was. You have persuaded me and jogged my rotten memory. But let me consider a new angle. This applies to general lighting right? Can I claim that general lighting is different from the event lighting and consider the event lighting as a process load? So when there's no one playing and they're doing setup or cleaning or whatever, general lighting is on. But when the TV broadcasting starts the event lighting goes on. The background is that I have been involved in the planning of several Stadium Arena and Multipurpose Sports Halls and the connected lighting power is always huge. So in my mind there is a "industry baseline" here and 25 W/m2 just doesn't feature on the playing area.

I think the event lighting is included in the allowance. I would have to look in the IES Handbook to be sure as they provide the illumination guidance that coincides with the W/sf allowance in 90.1. I could be wrong and this could be a gray area.

While you're checking...could you see if underground parking is included in the building types (other than parking garage) in table 9.5.1 for the building area method? Previously, I've been splitting buildings into 2 or more main building areas as is the accepted method, but I'm curious what the IES Handbook says. I don't have it.

Sports arena lighting would be required to provide 1000 lux on the playing surface by IES. The 90.1 lighting power density (LPD) allowance would assume that the lighting design will provide the 1000 lux at the LPD allowance or lower. You might be able to make the case that any illuminance provided over 1000 lux for cameras or other needs would be considered process. You would need to be able to separate the event lighting from the general illumination lighting to make that case. Indoor parking facilities are not quite as simple. The appropriate light levels vary considerably depending on the task. IES publishes a separate guidance document for indoor parking - https://www.ies.org/store/product/lighting-for-parking-facilitiesbrpdf-tent-available-late-oct-print-midnov-1353.cfm The Handbook references it and refers you to the general illumination categories rather than anything specific to underground parking. The guidance provided in the Handbook says that the illuminance levels in a parking facility are 50 lux or less.

Great Info! Thanks Marcus. For your information the relevant FIFA requirements can be found here http://www.fifa.com/mm/document/tournament/competition/51/54/11/stadium_tech_rec_req_guide_to_lighting_en_7306.pdf "Lighting specifications for televised events" starts at 1400 lux (vertical) & 2500 lux (horizontal) with a colour temperature of >4000. LEDs are slowly breaking into the market. The best luminous efficacy in lumens per watt I've seen here is about 100 (we had a manufacturer in house recently). The maintenance and energy usage is still a debatable topic. Although LEDs claim lifespans of upto 25 years, this is mainly based on lab experiments. Few lights have been around that long to testify. As for the energy, the LEDs sometimes move the consumer up stream to the switch gear, etc. so the LED itself uses less energy, but the other componants like cooling devices, high frequency "switchers" etc. use up a nice chunk of the potential savings. It's quite important to get the right mix to max out on the potential savings.

For the sport lighting, would you use HID lights for the baseline and LED lights for the design case?

Lighting in an energy model is entered in watts/square foot (lighting power density) for a given space. The type of lighting technology will influence the lighting power density but it is not explicitly modeled. Baseline is according to 90.1 Appendix G; Proposed is as designed.