Lewisia Christmas Strobe Light Blue 24 LEDs Flash Lighting for Kids Children Birthday Halloween Clubs Stage Light Effect DJ Disco Bars Parties Top race mini disco 24 LED blue flashing strobe light instead of 21 LED Compact and lightweight, bright blue flashing strobe light. Perfect as Christmas lights. Variable speed knob to control the flash rate from slow to fast for indoor use. Up to 12 flashes per second Put these in your attics or garages as a humane deterrent for squirrels, mice, rats, bats and even spiders ! An inexpensive way to use with motion sensor as a visual alarm indicator You would not misses deliveries. This strobe light makes for a great DIY project along with an electronic interface, when the doorbell rings, the bright mini LED strobe light will flash for seconds, perfect for someone who often can't hear doorbell.&lt;