75mm Optical Glass Lens for Flashlight/Spot Light

Pros: A three inch diameter aspheric lense for under 10 dollars! I used this lense in a modified mag light. Installed an SST 50 emitter on a fabricated silver and copper heat sink, made an electronic PWM ballast to run at seven amps, powered it with two D cell lithium ion batteries and the beam proected through this aspheric lense is positively unmatched by anything so far. A solid white shaft of light that shines two to three times further than any other light. Wow

Cons: This lense is just what the Doctor ordered.

Other: use an over driven sst 50 with a siver heat sink, project it through this lense and there is a new level of achievement with LED Flashlightology. Theperfectlight.

Pros: It seems very well built, I couldn't find any con. I've bought for a project of a diving flashlight. Using underwater won't account too much weight but you should consider it's weight for other purposes.

Cons: A little bit heavy, but if this isn't a problem for your project it's great!

Other: I've loved it and it worked well for my project and may be worthy for you too. Keep in mind it is a bit heavier than it looks.

Pros: Looks to be very clear glass. I bought one, and it has much, much less molding defects than the one I got from one another place with a word "Good" in its name. Used it in a homemade flashlight.

Cons: It's not perfect, but I don't think, that molded lens could get much better. The outer rim is not round, but has some irregularities, that makes it more difficult machine a tight fit housing.

Other: Hope these lenses will get only better in time...