@@ This JTL umbrella is an all white reflective umbrella with the ribs on the inside, concave side. It produces soft, wrap around style lighting perfect for single light portraits. @@ Light loss is minimal, approximately 3/4 stop depending on the distance to the light unit. The long shaft allows the umbrella to be moved closer to the light source for a narrower beam of soft light or further away for a wide beam of soft light. This wide beam is perfect for lighting couples.@@ The removeable black backing of this umbrella prevents light loss through the back, therefor reflecting most of its soft light on the subject. With the black cover off, not as much light is reflected. @@ With a powerful strobe and the cover removed, you can turn the light & umbrella around and shoot through it giving almost the same effect as a soft box.