My 5040UB will be one year old in two weeks. It's my only display. Today, when the original lamp reached 3089 hours, mostly on High Power Consumption, I decided it was time to change it for a new one.
The image is now brighter. It's not an earth shattering difference, but it is better. It's probably about the same difference as going from Med power to High power, but this is just a seat-of-the-pants measurement.
Epson 5040UB FW1.11, Elite Screens 5D 100", Mac Mini/JRiver, Sony UBP-X700, OPPO BDP-105, ATV4K
Krell S1500/Martin-Logan LCR, Emotiva XPA-200/Martin Logan Surrounds, Sumiko S.10 dual subs
Emotiva XMC-1 V3/FW-5.1a, CRM-114