I want to buy a light or an off camera flash. last weekend I took some outdoor pictures of a friends family and had an extremely difficult time getting rid of shadows. I see a lot of LED lights less then $100. They are mainly marketed for video, but are they worth it for still photography or should I invest in electronic triggers for my Yongnuo flash? My main use would be for outdoor portraits, but also some indoor shots. I do hope to put together a mini-studio for home and travel.