i am NW45 and i use several things to highlight under my eyes:
hullabaloo hi light powder- balloonacy
lighhearted mystery powder- stylistics
select moisturecover concealer- NW 40 and 35
beauty powder- pearl blossom- barbie
pigment- helium- ballonacy
pigment- off the radar
eyeshadow- retrospek
Mineral Skin - new vegas- alexander mcqueen
Mineral Skin- glissade- danse
fluidline- uppity- antiquitease
Mineral eye- family silver
eyeshadows- wedge, bamboo, lightray, b-rich - any of the light to medium browns are practically foolproof once you get skilled you can branch out. one of my favorite under eye lighlights is motif eyeshadow.
i normally use the 188 brush and buff product on in a circular motion for the cream and liquid products.
i normally use 225, 227, or 168 for the powder products- especially the pigments which can go on too heavy if you use the wrong brush.
i think the thing to remember for darker skin is that we have to use products that are not necessarily made for hi lighting to get the job done. (one reason why i use fluidline on my face, instead of just lining)
TIP #1- keep in mind that things that look really light are actually gonna work and not look ghostly like you may think. the regular bronzer and whatnot arent really gonna show on darker skin because we already are that color.
TIP #2: its a good idea not to match finishes until you get really good with your application. for example, if you use a shimmer highlight, then go for a matte blush to avoid looking like a big frosty mess! the exception is matte +matte. you can always use a matte highlight and a matte blush together.
TIP #3 along the same lines- you may want to contrast the finish of your lid color and under eye highlight color. a frosty lid and frosty highlight can b a bit much in the daytime. again, mattes are the exception.
please buzz me if you need more ideas or tips!!!!