NOV Inc. provides equipment and services to the offshore energy industry. Its offices and warehouses at Kristiansand and Stavanger were lit by conventional lighting, mainly T5 fluorescent, halogen, and HPS luminaires. According to Peter John Eggleton, Head of Maintenance, the initial driver for the project was to get ahead of the phase-out of fluorescent lighting due to the Restriction of Hazardous Substances (RoHS) directive. Also, NOV was eager to reduce costs due to skyrocketing energy prices. “We’ve gone over 2 NOK per KWh. That’s an astronomical cost, we’re talking hundreds of thousands of NOK a month for an operation our size,” said Eggleton.
Nearly 2,000 LED luminaires replaced the conventional lighting. The offices in Kristiansand and Stavanger were fitted with Glamox C77 ceiling panel luminaires, and Glamox C80 luminaires in the reception and some meeting rooms. These were connected using Glamox wireless radio. Sensors in the luminaires enabled detected motion and daylight harvesting to provide light only when and where it was needed which further saved money.
The warehouses in Stavanger (~6,000 sqm) and Kristiansand (~9,000 sqm) are now equipped with Glamox i80, Glamox i81, and Glamox i10 luminaires – with little use of sensors due to height. Installation for the entire project was done in-house, around normal work schedules.
The combination energy energy-efficient luminaires with sensors and light management systems made for impressive energy savings. In the offices, the electricity use was reduced by more than 90%. The projected ROI of 1.6 years will be even shorter as it was based on using 100% of the light output of the luminaires, but staff asked for light levels of 20%-60%. Another unexpected result was the time saved on maintenance. Eggleton estimates this to be two hours a day due to the long life of the new luminaires.