There was another thread under Apparel earlier this week about high-viz versus reflective items. Brooks has a couple of fairly lightweight, very high-viz, long-sleeved tops---one is the Podium, the other is the form-fitting Equilibrium. I don't think either has any great ambitions in the SPF-protection department, however. You might check out that thread and see if anyone mentioned other screamin' yellow ls shirts light enough for summer wear.....Good luck and welcome to TE!