Oil light stays on too long on a cold start

I'll have to see if I can locate those here. Thanks Dan.
I cleaned the oil pressure relief valve, it looked real clean and made no difference ...I changed the oil filter from a Wix 51806 to a Wix 51068 and so far the problem is gone.
And I personally have never had a problem with a "remanufactured" engine.....I have though had problems with engines built by very reputable builders.
Thanks for everyones help...