NOT KNOWN FACTS ABOUT WHY IS MY PROJECTOR SCREEN GETTING DIMMER

So as to ability the PSU, I required to faucet into your AC-Mains IEC socket that came With all the projector. I eliminated the connector, as proven underneath:Therefore if 50% loss at 20k hours, twenty five% decline at 10K hours. Have you communicated with manufacturer engineers concerning this and does it fluctuate by manufacture or maybe model?