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I recently purchased eight LB230 bulbs for my recessed lights in my living room.

According to the product data sheet the operating temperature for the bulbs is -15 degrees C to +40 degrees C (5 Degrees F to 104 Degrees F). When I measure the temperature of my bulbs with an infrared temperature gun (after about hour of use) I am seeing temperatures of 150 degrees F. Do I have eight defective bulbs?? The only thing I can say that is a bit off is there is a huge difference in the temperature depending on where you do the reading. If you take the temperature from the front of the bulb it MIGHT be in that 104 range. The rear of the bulb however is around 150 degrees.

My questions are:
1. What is the maximum safe temperature for a recessed light?
2. What part of the bulb does TP-Link use to determine the operating temperature (front or back)? Shouldn't the hottest part of the bulb be what is used, I.E. the back of the bulb?
3. If the rear is what is used, did I win the ultimate defective bulb lottery and get eight bad bulbs...?

thanks!