Just a rough answer, the SST40 might pull 3.5A at 1000 lumen OTF, while the 50.2 might pull 3A. So it looks like the 50.2 will be a bit more efficient at 1000 lumen.
One thing to consider, the SST-40 will probably look brighter at 1000 lumen than the 50.2 at 1000 lumen because the light will be focused to a smaller hotspot and look more intense. The 50.2 will spread it’s 1000 lumens over a bigger area making it look less intense.
I noticed this when dealing with similar sized lights using the 50.2 and the 70.2. I like 1000 lumen when walking around with the 70.2, but the 50.2 looks just as bright at 600 lumen. It’s about the intensity difference. Since I don’t mind the smaller hotspot, I tend to use the 50.2 at the lower level and get the benefits of less heat and longer battery life.
Thank you for the explanation. By the looks of it, I think I will wait for the 50.2 version rather than getting the SST40 now. Quick question about the throw difference though. What’s the % in throw difference ?
