Recommendations wanted for factor 50 facial sun cream

[Sunflower6]

I suffer from melasma and want some factor 50 facial sun cream that doesn't block my pores and cause spots. I am currently using elizabeth Arden but that is causing me to break out. A once a day sun cream would be preferable.

Obagi nuderm. Doesn't block pores and is a very effective physical blocker with zinc that doesn't leave a white cast. Best sunblock out there IMO but it is pricey, which is the only drawback.

I am currently using La Roche Posay Anthelios Factor 50+. I use the tinted version but it is available untinted.

I wore it last Saturday when it was bright and sunny all day here. I went out walking for about 3 hours in the early afternoon and had no signs of being in the sun at all. Poor DP - who doesn't believe in sunblock - got a right roasting!