culturing phytoplankton with what spectrum of light?

[krayziez]

Was wondering if blue leds would be optimal:
http://www.amazon.com/HQRP-Square-L...9&keywords=grow+lights&refinements=p_36:-3000

Or should it be a combo of both whites and blues:

http://www.ebay.com/itm/New-48-LED-...ght-Lamp-WP-/111687917117?hash=item1a011e5e3d