These are really good guys way better than expected, all of this footage underwater was on the lowest power . There are three power settings the top one will give a burn time of 30 mins , middle setting 2.5 hrs and the low setting over 7 hours . To give you some idea the high setting will easily light the big chamber at Minllyn and the large ones in Cwmorthin. We use them both underwater and also above, they do get a bit warm if run to long above the water . ?55 each and cover my 15mm wide angle lens easy ! 

https://youtu.be/BOmdEaa4_wI

The important thing is the name and where you can get them and might be silly but are they are diving  lights or just OK in freshwater. I am thinking of sea diving.

mrodoc said:

The important thing is the name and where you can get them and might be silly but are they are diving  lights or just OK in freshwater. I am thinking of sea diving.

Click to expand...

I have used them everywhere sea water freshwater  and down to 72 mts all the Malta videos on our YT channel are using them , take a look at the tunnels and cavern video on there. here is a link  . no name /unbranded mine are the 27 LED model, I have two 


https://www.ebay.co.uk/itm/233342058634?_trkparms=aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D20201210111314%26meid%3D99e5f4f5788143cca6f907ecb874b084%26pid%3D101195%26rk%3D4%26rkt%3D12%26sd%3D313082450420%26itm%3D233342058634%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DSimplAMLv9PairwiseUnbiasedWeb&_trksid=p2047675.c101195.m1851&amdata=cksum%3A23334205863499e5f4f5788143cca6f907ecb874b084%7Cenc%3AAQAFAAACENZjrOkmKftYQCna76rK0E5PrQICHMnEtmwpxbLtmikz1sDax40vw26WA03%252FeRrcxb6Am89N0ZJP3%252FGn7OK0puBJEzTCwA7CMvmEkG9rAHt1GoqRnwn%252Bb8C38WZDx%252F%252F1p9pc1ZMmkAj%252BSmtjlxjitPAcuGpSnQy0oGqpsFM%252Bf1Yw8BY6188enjjSagogrPXqC0BZStZOy3ddHlnTSPPquswt9HzcjEaK3nmOc6or0V7EexdPhUSCjohaGXRi9Zq%252Be1RKeKp53YBIm4m3oDmSfrpM8qgFgHZvWYoN9uoqIE5qPUWPfEq6x1W3s5vwXg0kPVH%252FlAZ4SjWVjWZc1f4Ki%252BWj05Eq1LaStq4FISB5iwPjZBY7yVx5qXPy0MuIQEDy%252BFNhtzncgtQcbYA5S506fotyKN7Qz33sDY7%252FQ6hPLmSHK0LfqKOvRvQku2kSymRCR8UKqsCJg4WpNfKgETjtKOKvb2YUMXcFx4LW0n8JOB0wWWoEHwyPYmzC%252BkU2c9fDhpSLOsWzB6rTHhaV1xmc75NCq2TYujUIvHshhR49xOdGqncEa4Zq3nhdiJEnQgt7KM4P9dEMAoOWl%252FgW%252FCyf619M554LwUxuwAW9zKlwRb5erDJO9B7V2RsP444Vh2VCG%252BaHX921YvMCHZPuw0oq6ah28fUvu%252BWEo09rVAAQfeCa4Ls%252BE5OdRXKhUhYBLp%252BtHQ%253D%253D%7Campid%3APL_CLK%7Cclp%3A2047675