Socanland 310 LED - Feedback please

Interesting light. I don't own one but perhaps I can offer my opinion based on the specs alone, and until someone who has one chimes in we can only be in doubt about the flicker/banding and humming thing. However, the unit according to specs is quite a largish one measuring almost 10 inches wide at a volume displacement of almost 64 cubic inches. Kind of large for an on-cam unit (that's without the battery attached. For a unit that large and shelling out >600 lux at 1.2 meter mark is not really powerful at all unless it's a typo error. That unit with all leds on at full pop according to size should easily go over the 1200 lux mark. If it is around the 600 lux then it is around a 35 watt filament equivalent. Let's see. The unit does accept the NP series batteries that are 7.2 volts BUT the specs say that the voltage range is between 12 to 17 volts as input. therefore I can only imagine that the driver used is a boost type that raises the 7.2 volt to within operating range. Boost drivers are most likely the PWM (pulse width modulation type, although buck versions have that too) and may cause the banding/flicker issue. Humming is another thing altogether. I say "most likely and may cause" as I cannot be 100% sure on this one. The specs say the NP-F 970 battery ( usually they are in the 6700 ma capacity rating) gives 300 minutes run time. So really that means the battery of 6700 ma or 6.7 amp per hour rating will last 5 hours (300 minutes). So a little arithmetic says that the unit's current draw is ( drum roll please ! ) ... 1.34 amps. What does this all mean ?? simply that the 1.34 amp draw at the 7.2 volt battery equates to P=VI which is 9.68 watt power draw. Now that was easy. Now we get to the nitty gritty part. Not all that wattage goes directly to the leds themselves, no, some of that is eaten up by the driver efficiency factor ( estimate around 80%),so now we lose 20% of the consumed power to the leds. The leds now draw .8 X 9.68 W which is 7.74 watts. Considering that amber tinted leds at best are around 80 lumens per watt and blue tinted ones are at best 100 lumens per watt rating ( both on for neutral tint of 90 lumens per watt) then we have an average of 90 lumens per watt X by 7.74 watts = 696 lumens. Because they rated it at 1.2 meter instead of the normal 1 meter mark, which is about 20% more than 600 lux ( 720 lux) really fits in with their >600 lux rating. At least they are honest with that one.Again, I may be wrong and please correct me if I am.
 
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