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New Accessory- Dive Signal Light

Dive light with metal housing and blue hue

At See the Sea RX, we primarily focus on our custom prescription dive masks but we do have a few accessories available for those making their dive mask purchase.

We recently added a few new products to the website, including the new scuba pro d-mask, but one accessory I am excited to have added is the new IST signal light. 

The signal light is a hybrid underwater flashlight / signal device. While many of us divers grew up placing glow sticks on our tank valves during night dives, the signal light can be attached to your tank instead for a much brighter and identifiable light source. Similar to the IST Apollo Light, the Signal Light is made from aluminum and feels sturdy in the hand. You might just feel a bit like a Jedi with the signal light in your hands. 

The signal light can also be used to gain attention from other divers and boats while on the surface. The signal portion of the light, the heavy polycarbonate piece, screws off and the signal light can be used as a backup dive light (although colored), down to 100m/330 feet. The signal light can be added to your dive mask order for $70.00 and comes with everything seen in the picture to the right (no battery included). Keep reading for more information on the signal light. 

Using the signal light as a dive light

The clear polycarbonate portion of the light is removable (I wouldn’t encourage doing this underwater, as it would be easy to lose), and the signal light can be used as a backup dive light. In the above two pictures, you can see the light after the polycarbonate portion has been removed. The signal light comes with a keyring on the bottom, and I suggest attaching a lanyard or another attachment device to prevent losing the light underwater. 

What about batteries?

The signal light requires one CR123 battery which last about two hours. The battery is not included. I highly encourage divers to use a rechargeable CR123, and there are various options available from other sources for the battery and charger.

The signal light comes in two colors, green (as seen to the left) and blue (as seen above). 

Both colors are very visible on the surface and underwater, but without the polycarbonate/ signal portion of the light attached, the green light will pierce a bit farther in the water and be brighter. 

How to order the signal light?

You can add the signal light to your prescription dive mask order during the order build out process. Once you have chosen your corrective lenses and mask (or selected to add prescription lenses to your mask), at the bottom of the order page, there is an accessory section that includes a few lights including the signal light. 

As always, if you have any questions, don’t hesitate to reach out! Next time I go diving, I will try to add some pictures of the signal light in use!

Picture of Josh


Josh is an optical technician and owner of See the Sea RX. He is a PADI instructor and has been involved in diving for more than 20 years. He has also worked as a sergeant at the Harris County, Texas, Sheriff's Office, which included time as the instructor for the dive team. Josh also holds a masters degree in data analytics from Texas A&M.