In for a penny, in for a pound. I'm going to make a set of highpower front LED lights. 2 units of 2 LEDs ... max output about 800 to 1000lumens I thought whilst i'm at it, why dont I make a rear light too. A unit with a pair of red 3W Luxeon LEDs. About 200 lumens on the spec sheets. But i can choose how wide or narrow to make the rear beam. So which would you choose if you had the choice? A narrow beam with a really intense sweet spot or a generally wide spread out beam?