Philips Master Master Color 315w 4200K CMH Lamp
Superior color quality. Crisp white light. 4200k color temperature, High 92cri, 34,300 initial lumens (109Lm/W). High 90% lumen maintenance at 8,000 hr./High 85% PPF maintenance at 20,000 hr. Unique Open Rated Lamp construction reduces radiant heat from the arc tube and is suitable for open fixture use.
Until the lamp has achieved a least 10 hours of operation, the lamp should never be turned off sooner than 2 minutes, including during the installation test. In case that this has happened, you will have to wait 1 hour before switching on again. Failure to comply with this requirement may lead to ignition problems.