When things aren't going their way, Las Vegas gamblers can toss in their hand, change tables or try their luck at a different game. But what if the rules suddenly change in the middle of the game… and it's too late to fold or leave the table.
当事态的发展趋于不妙时，拉斯维加斯的赌客们可以收手，换张赌桌或在另一个游戏里试试手气。但如果当游戏进行到一半时，游戏规则改变了呢？并且也来不及离开这个游戏？这就是当时作为The Palazzo Las Vegas酒店和赌场的照明团队面临的处境。
That was essentially the situation facing the lighting design team for the $1.9 billion Palazzo Las Vegas hotel and casino, which opened in January 2008.In 2006, about halfway through construction of the mammoth, 7 million-sq ft, 50-story complex, designers were informed that The Palazzo was to be registered as a USGBC LEED project. (Now Silver-certified, it is the largest LEED project in history, it is the largest LEED project in history.) The shift in focus toward LEED forced the lighting team-led by Martin Van Koolbergen, a partner with Kaplan Gehring McCarroll (KGM) Architectural Lighting, Los Angeles-to rework major elements of its design which it began back in 2003. The goal was to meet or exceed the ASHRAE/IESNA 90.1-2004 standard in major areas of the facility to help to project earn a LEED point for "optimization of energy performance."
该项目造价为19亿美元，于2008年一月开业。在2006年，在这个700万平方英尺，50层高的庞大建筑综合体建造到一半的时候，设计师们接到了一个通知，那就是ThePalazzo项目需要去注册成为 USGBC LEED项目（最终这个项目获得了银奖认证Silver-certified，并且这是史上最大规模的LEED项目）。这一针对LEED评级而发生的设计变动迫使照明团队将始于2003年的设计主要工作重头来过。当时的照明团队由身为KGM瑞国际照明的合伙人之一，Martin van Koolbergen带领。设计改动目标为在重要的区域符合或超越ASHRAE/IESNA 90.1-2204标准，来帮助项目通过LEED的评定，体现“最大化能源的利用”。
Complicating matters, says Van Koolbergen, was that fixture manufacturing was already underway. "We had to go back to our specifications knowing that the fixtures had already been ordered. For the majority of the project, it was are lamping exercise." That relamping exercise-which encompassed The Palazzo's "podium" (public spaces and the casino) and the “tower" (including guestroom sand corridors)-led Van Koolbergen’s team on a relentless pursuit of watts that could be shaved off the original calculations, without sacrificing the hotel's architectural appeal. "The revised lighting power densities were designed on a location-by-location basis." he says.
但麻烦的事情是，当时的灯具已经下单生产了， “当知道灯具都已下单了之后，我们只能回头查看原有的灯具选型，思考如何进行光源替换。”Van Koolbergen说道。整个替换光源的范围涉及了The Palazzo的裙房（包括公共区域和赌场）以及塔楼（包括客房和走廊），Van Koolbergen的照明团队力图在保证灯光效果的前提下，尽可能得削减耗电量。“调整后的照明功率密度是一块一块区域抠下来的。”
In the most extreme case, the design team went from a "limitless" watts per sq ft allowance for the corridors outside the guestrooms to a mere 0.5 watts per sqft. Even the back-of the house areas went from as high as 1,91 watts per sq ftin some places to 0.91 across-the-board through the use of energy-saving,long-life fluorescent lamps. Cove lighting, downlighting, accent lighting and the lamping for decorative fixtures were all revamped.
在这个近乎极端的案例中，以酒店客房外的走廊为例，照明团队需从原先无限制的功率密度调整为0.5W/sq ft。甚至在后勤区域，通过替换为高效率、长寿命的节能灯，功率密度也全面削减，从1.9 W/sq ft降至0.91 W/sq ft。线槽灯、下照灯、重点投光灯以及装饰灯具的光源均被替换。
All told, the lighting design is projected to save 3.3 million kWh per year. What follows is a look at selected areas within The Palazzo where the revised lighting design yields significant energy savings.
总的来说，整个照明工程最后节约的年用电量为330万度（KWh）。接下来我们就具体看一下经过调整后的重要照明设计区域。
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