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Clean white light. 3,100° K color temperature, excellent 92.6 CRI, 37,913 initial lumens. The 3,100° K has a very high 1.82 PPF per second light source. 4,200° K color temperature, excellent 97.5 CRI, 31,127 initial lumens. The 4,200° K has very high 1.70 PPF per second light source. Good lumen maintenance and excellent PPF performance throughout lamp life. Unique open-rated lamp construction, including a ceramic arc tube contained in a protective quartz glass shroud with PGZX18 base, reduces radiant heat from the arc tube and makes these lamps suitable for open-rated fixture use.
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