Just picked up a pair of Sola 4000s from David at ScubaCam here in Singapore. Decided to go with the 1 inch locline arms. Spent some time mounting them in the optimal position on the handle on my Takla Makan housing.
Very impressive light output. On full power underwater, these beasts will challenge the sun. On lower power, a couple of dives can be done on one charge. The range of power settings should allow quick balancing with ambient light.
Switches on in the middle of the power range (1500 lumens) and can then be stepped up and down from there.
Very even light coverage over 90 degrees. The pair easily covers my WA dome on full wide.
Balance: Not sure yet. I've mounted them on the centre of balance so impact should be neutral.
Weight: The pair are slightly heavier than 3 x Sola 1200s so I might be able to take out 1lb of weight from the housing.
Has a couple of nice features: Travel switch to disconnect the batteries from the light head. Even has a icon of a plane. Should get through most airport inspections in Asia. But, for even more stringent places, can remove the light head altogether.
Another bonus: SOS light in case you get lost. Very bright and lasts for many hours.
Dislike: Very minor issue but the travel bag supplied with the lights is made from some kind of black towelling. (David reckons they look like cossack hats). The towelling is shedding lots of bits of fabric. I'll put it through a couple of wash cycles but if they don't stop shedding they are destined for the bin. Last thing I need is a bag full of fluff near my o-rings...
Dislike: The blue filter is not included. Looks like L&M are going to charge extra for them. A bit cheeky given that their website indicates that it is part of the light.
I'll be doing a dozen dives with them in the Andaman Sea next weekend so I'll report back after then. So, fingers crossed that the batteries, chargers and electronics are reliable.
Regards
Peter