Current USA SunPaq SmartPaq 65-watt bulb is handcrafted with the best components and phosphors and rigorously tested, setting a new standard in compact fluorescent lighting. SunPaq lamp provide professionals serious output for serious growth. We created a line of high lumen output lamp with quality beyond expectations. SunPaq lamp feature the highest lumen per watt output of any compact fluorescent lamp, that means higher growth with less power. By incorporating the industry first dual phosphor technology, Current was able to combine color combinations in a single lamp that changed the underwater world. Lamp is not created Equal Rigorous testing, which includes a 10-hour burn in process for each lamp, ensures quality and performance all the way to your aquarium. Handmade for quality assurance, every SunPaq lamp is handcrafted with durable 2-mm glass tubes, hand-blown and pressurized with pure argon to create the perfect environment for energizing the lamp phosphors. High quality Philips lamp filament provides the right amount of kick to fire the lamp and maintain high lumen output. 18-Karat gold plated pins ensure excellent conductivity and reduce failure due to corrosion. Two phosphors are better than one dual phosphor technology makes the SunPaq lamp a brilliant choice when it comes to compact lighting. Utilizing a proprietary blend of phosphors from Nichia, SunPaq lamp produce eye popping colors and superior lumen maintenance. Comes with a 90-day warranty. SmartPaq bulb features both 460nm actinic and 10,000K daylight spectrums and GY10Q square gold-plated pin configuration. A complete 50/50 mixture of deep penetrating full spectrum daylight and concentrated actinic blue energy. Provides the benefit of high light output levels combined with the correct spectrum for symbiotic algae and coral growth. Measures 21-1/4-inch length by 1-3/4-inch width by 1-inch height.