Q1: What is the Warranty for the bulbs?

A1:  For the lamps,we have 3 years warranty.If any quality problems on our side occured in this period ,we will take on the shipping cost and replacement.

Q2:  What is colour temperature?

A2: Sunland's LED Lighting offer lamps in warm, natural,pure and cool  white with colour temperatures measured in  Kelvin (K). The lower the colour temperature is, the warmer  the light given by the LED:

• Warm white = 2700K-3200K
• Natural white = 4000K-4500K
• Pure white = 5000K-5500K
• Cool white = 6000K-6500K

Q3:: What is CRI?

A3: CRI is a figure which feedback the real objects colors.Higher CRI with higher cost.For LED tubes,the CRI is mostly 70-75Ra,and 80Ra with higher cost.But there are some suppliers write a high data to attract clients,please note.

Q4: What is the specific size of the screw base on your Edison base LED bulbs?

A4: The size is E-27/E-26. This size works in all common fixtures.

Q5: Why does my LED light bulb not work properly in extreme temperatures?

A5: Any temperature below 14 F or above 122 F may cause a LED bulb to flicker, dim, change color, or cease to function. Once the LED bulb is returned to an operational environment it should began to work properly.

Q6: What is the AC Voltage tolerance for our LED bulbs?

A6: Their AC voltage tolerance is +/- 10%.