3 stars since unknown everything
Ease of install: Took me 3 days. I was completely disorganized and unprepared for this. On average it should take about 30 minutes to an hour to average adult with tools and reading instructions. Due to my disabilities I have hard time to do so. I had to improvise and work around since nothing is perfect and immaculate as it is shown in installation video.<br />Value for Money: unknown as well since its not like you can observe this in work directly, without doing serious damage to yourself. All I know I smell some sort of burned wire smell from ventilation shaft when I turn it on. I bought camera to stick in where bulbs are at, but since I sealed entire area around the duct, it will take days for me to get to  install it and I need power plug for the camera and I have no idea how powerful this UV-C light is. Will it destroy/melt the cheap platic Camera ot will it survive UV-C radiation that basically giving long term radiation sun tan?<br /><br />Longlevity: No idea as well. I just got it a few days ago plus several days of installation. The bulbs supposed to last about one year, but there rumors out there it is much shorter time.
Rating: 3 stars