i have Oakley Minutes with gold/iridium lenses (earlier referred to as amber lenses).i've found they dont block out too much light,in fact they seem just right for sunrise/sunset when you're flying into the sun,as well as for normal and overcast conditions.this lens is,i think,one of their less tinted ones but really does a good job,and in bad light it tends to enhance dull colours on an EFIS.
only problem is they tend to get all steamed up if its really hot and i'm perspiring!
oh,and by the way,polarised lenses are a definite no-no.
apart from affecting how you see an EFis screen,they can cut out certain colours of light,therefore,you may for example not be able to see a blue aircraft against a blue sky,which would obviously be a danger.
