Hello,
I've been a lurker for a while now and decided to build a first light of my own. I'm interested in a dynamo hub powered headlight for general road use at speeds around 25 kph and was thinking about using a single Cree MC-E wired in series and a Ledil Iris lens. The Iris comes in two versions, spot and medium, and I don't know which would provide the right balance of throw and spill for my target speed. I don't mind experimenting and could order both versions to see which works better, but I thought I'd ask first. I can also order other Ledil optics should the Iris be inappropriate but my local suppliers don't stock optics from other manufacturers. I know a symmetrical beam is less than ideal for road use, but would it get the job done? The LED and lens will probably sit in a custom machined aluminum enclosure which I'll order from a local machine shop (don't have access to a lathe myself).
I've been a lurker for a while now and decided to build a first light of my own. I'm interested in a dynamo hub powered headlight for general road use at speeds around 25 kph and was thinking about using a single Cree MC-E wired in series and a Ledil Iris lens. The Iris comes in two versions, spot and medium, and I don't know which would provide the right balance of throw and spill for my target speed. I don't mind experimenting and could order both versions to see which works better, but I thought I'd ask first. I can also order other Ledil optics should the Iris be inappropriate but my local suppliers don't stock optics from other manufacturers. I know a symmetrical beam is less than ideal for road use, but would it get the job done? The LED and lens will probably sit in a custom machined aluminum enclosure which I'll order from a local machine shop (don't have access to a lathe myself).