How often should we change the D25LT lamp? Follow

FAQ: "We have two D25LTs and currently we perform the following tests as described in the user manual."

• Standardization every 8 hours
• Color Check and Short Term Stability every month
• Lamp Check quarterly
• Long Term drift and signal level annually

How many hours does the D25LT tungsten halogen lamp typically provide? Will checking the lamp every quarter provide us with information that it needs to be replaced before it burns out?’"

The lamp is good for 1000 hours which is 2 months at 24/7 operation but because we highly regulate the voltage (that's the little green board that the lamp is soldered to), it typically lasts much longer.

To check the health of the lamp, I would probably run the Lamp Check monthly rather than quarterly.