What is produced during the light reactions?

during a light reaction two things are responsible for producing a reaction containing the 5 elelments responsible for these reaction. First and foremost an wavelength supplied by a DC current in other words what comes in and out of the friction of the wave... to be made from the original source one is then able to determine what is beiong produced by the actual current. Your question is fundamentally flawed in the fact that you have not stated the acvtual source of the light in which comes forth from. Are we talking about gas? are we talking about electromagnetisis? Or is it aq simple halogen light that you speak of? In order to assist you further I must know more information, you must restate your question in the form that would indicate about which light source youi speak of..

much like i could ask what comes out of the exhaust fromn a car.....One would Argue that well of couse exhaust fumes do,.... but what if i were speaking in terms of the car i was describing was electric?

that being said please try to state your questions clearer in the future and i may be willing to answer them