those osram / philips brand , after 2-3 year also wont dimming? Sometime the light no rosak , but can see very obvios dimming already

The cheap SIRIM LED from shopee just arrive 2 day ago , really susprise nowaday LED so light weight and with build in Driver , yesterday install it and let see can tahan how long to get DIM or burn out

The old LED that i replace was 2015 date Chop at the LED (actually this LED stil working , just become dimming) , and the old one with driver is heavy , time fly already 9 year using that LED  , back to 9 year ago it was consider as China Unbranded RM30 LED    , at that moment those Philips branded need RM60-70 for 1 Unit LED    (nowaday philip LED only need around RM20++) 

actually i wan to test out the Philip downlight too , but i see the outer size for philip is only 140mm , compared to my old china & megaman downlight which is 145-150mm+- , the philip run small , my inner hole is 130mm , just wonder why philip didnt follow standard 4inch size outer which is 145-150mm   

if replace the old light to philip , confirm will saw the square black mark  , can be solve easily with repaint a little at the edge of downlight , just need do extra step