they have a 2 LED rows (1 row 2700K, 1 row 5000K).
they are tunable (CCT selectable). they have 2+ and 2- connectors.
Efficiency: 129-135 lm/W
1ft/280mm: 5.6$, 1600lm
2ft/560mm: 10.7$, 3200lm
not sure how they measured the lumen... i think at either 2700K or at 5000K.. so both together would add up to 6500lm (560mm)
LINK: https://www.digikey.com/products/en/opt ... V=ffece668
here is how the VESTA spectrum (black lines) (2700K/5000K) compares to EB gen2 (white lines)(3000K/4000K/5000K):
(colored = PAR curve) i bought 1 pc 280mm and my strawberries are going crazy under it..
![Smile :)](./images/smilies/icon_e_smile.gif)
*UPDATE: look at livinglights calculations (YPF/watt), comparisons and graphs, on page 3 of this thread