I don't know that much about the technicalities of led wavelengths to be honest.
When i looked into building my own led boards i was going to use these for blue.
Product Specification
[FONT=verdana,arial,helvetica,sans-serif]
Prolight Power LED blue 5 Watt[/FONT]
[FONT=verdana,arial,helvetica,sans-serif]Technical Data:[/FONT]
[FONT=verdana,arial,helvetica,sans-serif]Case: Star-PCB with Aluminium-Cooler
Viewing Angle: 140°
Power: 7,1V
Current: 700mA
Wave Lenght: 470nm (blue)
Brightness: 40 Lumen[/FONT]
PowerRecommended Resistors5V -9V 2 Ohm / 2 W12V 8 Ohm / 4 W13,8 V (car) 9 Ohm / 5 W
And these for red.
Product Specification
[FONT=verdana,arial,helvetica,sans-serif]
Prolight Power LED red 5 Watt[/FONT]
[FONT=verdana,arial,helvetica,sans-serif]Technical Data:[/FONT]
[FONT=verdana,arial,helvetica,sans-serif]Case: Star-PCB with Aluminium-Cooler
Viewing Angle: 140°
Power: 4,4V
Current: 700mA
Wave Lenght: 625nm (red)
Brightness: 120 Lumen[/FONT]
PowerRecommended Resistors5V -9V 7 Ohm / 4 W12V 10 Ohm / 6 W13,8 V (car) 15 Ohm / 7 W
I have no idea of the actual ideal and correct spectral output of leds for growing,but i reckon that these will work just fine