This Remington SPIPL i-Light Replacement Bulb is suitable for use with both IPL5000 and IPL4000 hair removal systems. Each of these bulbs has an impressive lifespan of 1,500 flashes, with the design of these bulbs and main system an ideal alternative to conventional laser removal equipment. The Intense Pulsed Light technology is the same used in many hair removal clinics, while the multi-flash mode makes it an efficient method.