At the moment I am in the business of buying my first can light as I want to progress to cave diving maybe within the next 2 years.
I totally understand that communication is vital in caves and that your light source is your primary communication device. Hence I see that cave divers look for a focused beam. While researching different options and brands I often come across folks praising a light for its tight beam with almost no spill. Please forgive my ignorance but is a very focused beam with basically no spill really the thing you are looking for in a primary light for cave diving? Isn't a good amount of spill/corona necessary to illuminate the cave? After all I assume that you not only want to communicate in the cave but also look around a little?!
Still I rarely see this aspect discussed when choosing and comparing primary lights. Is it a none-issue?
Just to give you an concrete example, I was researching the Light-for-Me 4TEC LED primary light which is quite popular around here in Europe. It is praised as being almost as bright as a 21w HID but being half the cost. I came across this youtube video where it is compared to a 21w HID in the pool by night. The beam tightness and brightness seems to be relatively equal but if you look at the light spill, the 21w HID seems to be the winner. Just have a look at the last twenty seconds of the video (starting at 2:12; especially the last two seconds of the video) and compare the spill on the ground of the pool of the two lights. The 21w HID clearly illuminates the pool floor but the LED seems to only have very little spill. Still I have never heard anyone complaining about the LED having too litlle spill...
So how are active cave divers see this? Do you go for the tightest beam possible? Do you care for the light spill of your primary light? If you can adjust the focus on your primary light, will you always go for the tightest setting possible when cave diving?
I really appreciate your input as a can light is a heavy investment and I don't want to get the wrong tool for my goal (=cave diving)...
I totally understand that communication is vital in caves and that your light source is your primary communication device. Hence I see that cave divers look for a focused beam. While researching different options and brands I often come across folks praising a light for its tight beam with almost no spill. Please forgive my ignorance but is a very focused beam with basically no spill really the thing you are looking for in a primary light for cave diving? Isn't a good amount of spill/corona necessary to illuminate the cave? After all I assume that you not only want to communicate in the cave but also look around a little?!
Still I rarely see this aspect discussed when choosing and comparing primary lights. Is it a none-issue?
Just to give you an concrete example, I was researching the Light-for-Me 4TEC LED primary light which is quite popular around here in Europe. It is praised as being almost as bright as a 21w HID but being half the cost. I came across this youtube video where it is compared to a 21w HID in the pool by night. The beam tightness and brightness seems to be relatively equal but if you look at the light spill, the 21w HID seems to be the winner. Just have a look at the last twenty seconds of the video (starting at 2:12; especially the last two seconds of the video) and compare the spill on the ground of the pool of the two lights. The 21w HID clearly illuminates the pool floor but the LED seems to only have very little spill. Still I have never heard anyone complaining about the LED having too litlle spill...
So how are active cave divers see this? Do you go for the tightest beam possible? Do you care for the light spill of your primary light? If you can adjust the focus on your primary light, will you always go for the tightest setting possible when cave diving?
I really appreciate your input as a can light is a heavy investment and I don't want to get the wrong tool for my goal (=cave diving)...