It's All In The Lens Cliplight's 2nd generation UV LED inspection lights provide greater intensity through focal lens technology. Cliplight's Vector line of UV LED lights find leaks faster, accelerate the repair process, and boost profits. The secret is in the lens, with each LED having its own 'aspheric shape' lens element to harness and focus the UV beams of light. The Vector 7 (#87DC) has 7 UV LEDs and a rechargeable nickel metal hydride 1800mAh battery that has no memory effect. The 4 UV LED Vector 4 (#84DC), powered by a 9 volt battery with power indicator, light up the dye.