Why do LED's glowing very dull when I take input from Serial Port?

Using Arduino Programming Questions
1

I have a simple program that takes in three inputs to make respective LED's at pin 11,12 and 13 as the OUTPUT pins. If I make them HIGH usually they glow pretty bright but when I switch them from the Program given below, the LED's are very dull and dont even glow brightly. I am not able to understand what's going wrong. The program is as follows :-

/*
This is a typical program which would be used to test the
if conditions and execute the program in accordance to the
condition.
*/

#define baudRate 9600

//Declaring Variables for LED's
int redLed = 11;
int blueLed = 12;
int whiteLed = 13;

//This takes up the value coming up from serial port and is used for comparison
char switchOption;

//Calling setup in order to initialize
void setup(){
  //Next we initialize the pinMode
  pinMode(redLed,LOW);
  pinMode(blueLed,LOW);
  pinMode(whiteLed,LOW);
  
  //Next we begin the SerialCommunication by fixing the baudRate
  Serial.begin(baudRate);
  //Print status whether the Serial Comunication started
  Serial.println("Communication started...");
}

//Loop in order to iterate across the entire program
void loop(){
  //Checking if there is data in the Serial Port
  if(Serial.available())
  {
    //Reading from serial
    switchOption = Serial.read();
    //Sending input to the switching function
    switchLogic(switchOption);
  }
}

//Switching logic using if Statements
void switchLogic(char option){
  if(option=='r'){
    digitalWrite(redLed,HIGH);
    digitalWrite(whiteLed,LOW);
    digitalWrite(blueLed,LOW);
  }
  if(option=='w'){
    digitalWrite(redLed,LOW);
    digitalWrite(whiteLed,HIGH);
    digitalWrite(blueLed,LOW);
  }
  if(option=='b'){
    digitalWrite(redLed,LOW);
    digitalWrite(whiteLed,LOW);
    digitalWrite(blueLed,HIGH);
  }
}

Please help me to understand if I am doing something wrong due to which there is a voltage drop at those PINS?

2

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3

@spycatcher2k got it. My Bad.... I did not set them up as output rather I had written pinMode(redLED,LOW(rather than output)). Thanks a lot