Questions and Answers for Philips 40-Watt 4 ft. Linear T12 ALTO Fluorescent Tube Light Bulb Daylight Deluxe (6500K) (10-Pack)

A:  The diameter of a T12 linear fluorescent light bulb is approximately 1.5 inches (38mm). However, it's important to note that T12 bulbs are being phased out due to legislation laws and replaced with more energy-efficient alternatives such as T8 and T5 bulbs. T12 also comes in TLED - which might be a better option to switch to in the future

A:  I would suggest contacting your local store to confirm if they accept fluorescent tubes for recycling. You can also find the closest recycling drop off location by visiting https://earth911.com/recycling-guide/how-to-recycle-fluorescent-tubes/ and scrolling to the bottom of the page and inputting your zip code

A:  This is a 6500K Daylight Deluxe 40w T12 4ft fluorescent lamp. I am not sure what 987210 refers to - it does not look to be a Philips part #

A:  Yes! This is the exact replacement bulb

A:  This fluorescent tube has a g13 base

A:  This bulb has a G13 base (13mm spacing between the two pins)

A:  Depends on the ballast you have. I replaced mine with a newer version (Phillips Advance) that do have a warm up time. All the lamps instantly turn on about 1.5 seconds after throwing the switch. I read somewhere that longer start time saves the heater inside and extends bulb life.

A:  The light bulbs were as bright as they will ever be as soon as they are turned on!!

A:  This will ultimately depend on the ballast in your light fixture.