The issue is:
Does spectrum color influence lightsaber power?
I think don't it does- it might on the smallest scale- despite what the EU says; I quote Wiki:
This bit from the article says that the EU states that the color is just the color of the blade, and nothing more. However, the next except:Wikipedia wrote:According to the Expanded Universe, these gems merely determine the blade color. However, in Star Wars: Knights of the Old Republic, different gems may alter the intensity or damage type of the blade (making the blade more accurate, or more effective against droids, for example), in addition to altering its color. It might be worthwhile to note that in these games, separate crystals are used to perform different functions, and only one type of crystal is used to change the blade's color. Also, it has been said that a red lightsaber is somewhat less powerful unless charged by the dark side of the force, and when it is, it was told to be able to momentarily weaken lightsabers. (This was the explaination given for Obi-Wan's lightsaber doing slightly odd things in the duel with Vader in Episode IV.)
states that it does indeed have an influence on power.Wikipedia wrote:The synthetic red crystals favored by the Sith can create a somewhat more powerful blade than blue or green crystals but are generally not as pure because of their artificial nature and can thus be undesirable as the focus of a lightsaber. The Sith apparently had a large supply of red crystals and also favored red as a symbol for passion. It was not uncommon for the Sith masters to supply their learners with the synthesized red crystals. However, Darth Vader, at the beginning of his Sith period, wielded a blue lightsaber, as shown in Revenge of the Sith. Likewise, Exar Kun used a blue double-bladed lightsaber in the Sith War.
So, I'd like your thoughts, relevent information, and opinions on the matter, as a quick google search turned up beans, I have no novelizations, and I can't think of any examples from the canon that would suggest influences in power.
My conclusion:
The color of the blade does NOT influence power.
Wikipedia Article:
Lightsabers
NOTE: If this has been done before, please link me so I may read through. My search revealed no discussions.