Features:

Water activated submersible deep drop strobe lights attract baitfish, gamefish, and squid.
They were designed to replace the chemical lights used by commercial fishing operations

Automatic shine when into water
Brightness flashing LED
length :3 1/2" or 89mm
diameter:
1" or 25.4mm

Deep water : about 800 meters
Life Rating: about 750 hours
LED color: Red, Green, Blue, White
good use for attract octopus  and squid  fish etc come over
Fit in to the cavity of squid
Rig with a trolling lure
Rig together with a soft head trolling lure
Rig it in front of a swim bait

fit for fishing deep sea fish  tuna etc.