The larger LED will make more lumens for the same run time, but wont be able to be focused as well and ends up more floody. Since the size of the head is fixed, small emitters will make less lumens, but be capable of tighter throw when focused. Smaller LED emitters are not as efficient and produce less lumens per watt and cant handle as much power/heat. Smaller LED emitters are easier to focus and require smaller reflectors. Large emitters require much larger reflectors to focus the larger point source of light and tend to be more floody. More heat equals less life and efficiency. They are more efficient and can take larger current because heat is a limiting factor. Large LED emitters produce more light per watt. Reflector and lens design really determine beam profile. That’s obviously not the science behind it but I’m not a rocket scientist either.Emitters aren't really all that different, the beam is formed and focused after it leaves the emitter for the most part. Since you can’t get the throw from the OKW without it’s 70k candela. The higher your gpm is, the further the stream coming out of the tip works. If you have high psi but low gpm your going to get more mist and the further you get away from your target area the less it works. I look at it as lumens are psi and candela is gpm. A lot of people are more focused in on the total psi when looking at pressure washers and don’t really look at the gpm. The simplest way I think about it is similar to a pressure washer. The peak intensity, I believe, is measured from the most focused/strongest point of the light. If one light puts out half the total light output (680 lumens) of another light (1500 lumens) I just assumed less energy was being used.I just appreciate the technology, and I’am by no means the expert on this subject, so this could be wrong. I thought that Lumens was the total light output and Candela was the peak intensity, in other words, how focused the beam was. I guess I still don't understand the candela/lumen relationship then. I would think that the higher intensity of the light would be hotter and make the light step down in output more frequently than a lesser intensity, basically equaling out the run time. However the higher lumens/psi are helping to pull the output in a wider cone direction increasing the surface area which the output is used to do its job. The water tank will be your battery source in this example, typically your going to run through that tank faster with a higher gpm unit. So instead of using an infinite amount of water from a water line if you think about pulling your water from a 500 gallon tank. I just appreciate the technology, and I’am by no means the expert on this subject, so this could be wrong. That’s obviously not the science behind it but I’m not a rocket scientist either. I would think that the higher intensity of the light would be hotter and make the light step down in output more frequently, than a lesser intensity like the PLH with a rating of 30k candela(?) I think, basically equaling out the run time. The water tank will be your battery source in this example, typically your going to run through that tank faster with a higher gpm (or “candela”) unit. View QuoteI just appreciate the technology, and I’am by no means the expert on this subject, so this could be wrong.
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