I guess, you do not adhere to the trinity. Totally fine.
The video provided addresses erroneous uses of analogies which almost always lead to heretical ideas about God, and points out the orthodox position of the Trinity.
The problem with the light analogy you provided is that it's an example of one of those analogies that gets things wrong--even if that wasn't your intent, it is likely to provide more confusion for new Christians or those outside of the faith than add clarity.
Here is a more specific criticism of your analogy: It is true that white light consists of the entire visible spectrum, but even ignoring the fact that the visible spectrum covers all visible colors (in all their uncountable hues and shades imaginable) and is not just the three color rods in the human retina; ignoring that part, the problem is that it suggests God as a composition: that God (white light)
consists of the three Persons (the three colors), like an amalgam.
When, in reality, the doctrine of the Trinity teaches that each Person of the Trinity is fully and truly God in Himself, the Father is Himself God, the Son is Himself God, and the Holy Spirit is Himself God.
When we speak of the Father, we are speaking about God,
all of God.
When we speak of the Son, we are speaking about God,
all of God.
When we speak of the Holy Spirit, we are speaking about God,
all of God.
Each Person in His Hypostasis is the one, undivided God--fully and entirely God.
But we do not have three gods, because the Father is God, and the Son is God, and the Spirit is God, the
same God. But the Person of the Father is distinctly Himself, the Person of the Son is distinctly Himself, and the Person of the Holy Spirit is distinctly Himself. Each distinct, and yet one and the same God.
Thus there is one Being and three Persons. The Son is God because He is of the same Being (homoousios) as the Father, for He has His Being from the Father as the only-begotten Son of the Father, He is therefore God of God, the Son of the Father. Likewise, the Holy Spirit is God because He is of the same Being as the Father and the Son, having His Being from the Father [and the Son], as the eternally proceeding Spirit of the Father and the Son.
There is therefore one God, the Father, the Almighty Maker of heaven and earth,
And Jesus Christ, His only-begotten Son our Lord, who is eternally begotten of the Father, uncreated, God of God, of the same Being with the Father,
And the Holy Spirit, the Lord and Giver of Life who proceeds from the Father [and the Son], who with the Father and the Son is worshiped and glorified.
-CryptoLutheran