Questions for those that converted T12 4 foot fluorescent fixtures to LED.
Thanks in advance for any insights.
Is there a huge difference between frosted vs clear light emitting diode (LED) bulbs?
Can one discern the difference between a 84+ color rendering index (CRI) bulb and a 90+ CRI bulb?
Is there a huge difference between a 4000 Kelvin (K) bulb and a 5000 K bulb?
What's your favorite brand of 4 foot LED bulb?
I need to replace thirty T12 bulbs. One has been flickering and humming. I started really looking at them the other day and they are all getting a dark ring on the ends, some more than others. Also, it's obvious they are all not putting out the same amount of light or the same color for that matter. I'm very comfortable performing the required bypass ballast wiring, the single end power or double end power bulbs will work.
As far as I can tell the frosted bulbs cost a little more than the clear ones. And the higher the CRI, the higher the cost. The warmth of the light, 4000 K vs 5000 K, doesn't seem to figure into the cost though. The frosted bulbs come with a beam angle of 140 degrees, the clear with a beam angle of 120 degrees - I don't see that the beam angle makes much of a difference since the fixtures are mounted 8 feet up.
I did the math (or tried to) and it looks like my return on investment (ROI) on the LED bulbs is 2-3 years based on my estimated light use vs. if I went new T12 bulbs. I.e., new T12 bulbs are roughly a third of the cost of LED bulbs, but they cost a little over twice as much to operate and electricity cost is most likely increasing for me as the electric company wants consumers to fund their planned wind turbine venture.