Windowless Kingdom Halls contribute to the sterile, joyless atmosphere present in today's congregations. It also helps with climate control, lighting control, thus mood control. If security was an issue, why not glass block windows? One KH I attended removed the original windows in a remodeling. The next CO came in and said from the platform: "Where are the windows in this building?" So the windows were put back in. A few years later, they were removed again. The last KH I attended had a drop ceiling with cheap 2X4 ceiling tiles. The CO, Alan Hood, made no bones about his dislike. Again, from the platform, he told us our ceiling looked like someone's basement ceiling, and he couldn't even open the front door, and where the heck is the air conditioning? So the congo ponied up for all the changes. I always thought a stuffy building with open windows and fans made it more interesting. Closed doors, air conditioning, tinny sound, silly color schemes, poor lighting...... Kingdom Halls are awful places now.