Yep, the best thing you can do is to give her a shower to break-up the pin feathers on her head, as she can't do it herself...or if she lets you, you can do it for her by gently rolling them between your fingers to break-up the sheaths around them...But showering will help to break them up, hydrate them and then stop the itching...If she's really bothered by them, then you can try buying a bottle of Ecotrition Molt-Ease at any Petco, it comes in a nice-size spray bottle for around $12 if I remember correctly, and it's nothing but artificial Purcellin-Oil, which is basically what they excrete from their Preen-Glands and rub all over themselves when they preen, and then also natural Aloe-Vera...Just spray one, single spray on her head, that's all it takes, and it stops their itching almost immediately and it also helps to break-down the dry, keratin sheaths around the new feathers...
Lights aren't going to help at all to break-up pin feathers, and more often than not you end-up buying an artificial UVB light that is actually more dangerous than anything.