I have a Princton Tec Apex and it is an incredable headlamp. It has a center 3watt regulated LED with a heat sink that will put many high dollar flashlights to shame and it has a high (160 lumens)and a low setting. On the side of this are four ultra bright LED's for when the3watt is too much. There are three settings for these also, high, low, and beacon flash. With the four LED's on the high setting it is very bright and wide angle, much brighter then the Black Diamond also I have and still use as backup. On low it is great for reading etc at camp. It was the purchase in 2008 I would not trade. You can get colored filters, but they do not come with it. I just can't say enough about the headlamp.