Hi robincnn,
At 1.4Amps
Looking at the numbers on previous page for 3500K
3070 BB 50.77%
3590 CD 56.34%
Difference = 56.34% - 50.77% =5.57%
(56.34 - 50.77)/50.77%
Which gives 3590 has10.95% higher efficiency than 3070
However for 5000K Veg charts on previous page
3070 BB 54.68%
3590 CD 56.34%
Difference =1.66%
(56.34 - 54.6)/54.68
Which gives 3590 has 3.03% higher efficiency than 3070
Why would you compare them at equal wattage ?
imo a more logical way to compare would be with price, at same efficiency.
Price including lenses and holder ; using KB prices and PCT :
4 CXB3070 BB @ 1050mA vs 3 CXB3590 CD 72V @700mA
The total difference is < 1W, and ~1lm/W, and just about the same price ...all in favor of the 3590.
And it seems like there is general concencus that 3590's gain more efficiency when dimmed down, although PCT doesn't give us numbers < 49W
On the other hand, 3070's do have the advantage of more point sources.
This makes it a much closer call imo.
Thoughts anyone ?