Eiko A1A-60 A1A, 105-125V .6MA T-2 Wire Terminal Neon Light Bulb (Pack of 60)

Those reviews that complained that because its rated at 110v that you don't need a resistor are not aware of how neon lamps work. If you have a regulated power source you absolutely can operate at speced voltage. However, you absolutely cannot use this lamp directly on AC mains without a resistor.No exception, no mater how its rated.Your household AC is unregulated; thus the lamp will continue to draw more current until it burns out.So why choose a neon lamp with an operating voltage closer to mains AC voltage?Answer: Less power consumption when operating with a resistor.The amount of power wasted through a resistor is the squared difference between lamp and supply voltage. So a lamp rated at 120v (when running at 120v) would still need a resistor but would waste very little power through the resistor.Somebody asked what the resistor value should be. In case you are google adverse the way to calculate the resistor is:"Resistor value (ohm)" = ("Power source voltage" - 110) / 0.0006Power source voltage is the household AC voltage if you plan on operating the lamp directly from wall power.Use the closest resistor value to achieve designed ratings. Use a smaller resistor value to make it brighter. Or a larger resistor value to increase lamp lifetime. If you're not electronically inclined, closest does not mean whatever you have on hand. Use a resistor value that is reasonably close numerically; for example, 120k instead of 111.8kIf power source voltage is significantly greater than lamp voltage you will need a higher wattage resistor."Resistor wattage requirements" = ("Power source voltage" - 110)^2 / "Resistor value (ohm)"

Bought these specifically because they were rated for 105V-125V and I wouldn't need a dropping resistor. They fail instantly @ 110V. Destroyed 3 trying to get them to work. Contacted seller, here is their response: "We are not sure about the use of these bulbs. However, I think you need to use a resistor." No further guidance on value of resistor required. they will work when wired 2 or 3 in series but not at full brightness.

the project went well bulbs fit right in