Ok! I got some info back from the company Here it is! Yes you can use diffrent PAR and temp bulbs, Just match base and wattage.
Thank you for contacting E-conolight. As long as the wattage and base type match what the ballast can hold, the temperature does not matter. The temperature just determines the color of the light. The higher the temperature/lumens, the brighter the light. I hope this information is helpful to you. If you have any further questions, please either call us toll-free at 1-888-243-9445, or e-mail us; any of our customer service representatives will be happy to assist you.
Best regards,
Jessica M. Smith
E-conolight Customer Service
Ext. 3221