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

A:  The 18 year rating is based off of 3 hours of use per day.

A:  Your fixture is probably OK. I have had several different types of "new" bulbs that have not lasted nearly as advertised.

A:  Around is a very general statement. Do you mean diameter or circumference? Go into any web browser and look up "dimensions of T12 bulbs" After you look that up you will find what you need. 38 mm is 1.496 inches

A:  Yes - T12 lamps are all 1.5" in diameter

A:  I would suggest the 3000K bright white lamp if you are looking for the softest white light available. Check it out at www.homedepot.com/p/308442095

A:  This is not the best choice. Ask someone at Home Depot which is better. You want a bulb that works all the time. A softer light.

A:  I returned the fluorescent tubes and replaced the whole light assembly with an LED light. Much nicer!

A:  Cool white 

A:  We highly recommend recycling fluorescent tubes as there is a small amount of mercury in the lamp. Check out https://earth911.com/recycling-guide/how-to-recycle-fluorescent-tubes/ for some more information on how to recycle and help finding the closest drop off location

A:  Trash 

A:  They are not cfl and do not contain mercury. They are std floreseunts.

A:  The main problem with disposing light bulbs is that the rules and options vary widely, even across a single region. Always check with your local waste management authorities to find out the guidelines for recycling light bulbs, or what light bulb disposal options are available in your community. They will have the most up-to-date recycling information for your region. Contact your local The Home Depot to see what options they offer for recycling light bulbs, batteries and other spent electronics.

A:  There are two pins located at the end of each tube, and G13 has 13mm between each pin

A:  There is no issue replacing a 34w 4t T12 lamp with a 40w 4ft T12 lamp. The ballast will operate either lamp. Per ANSI specifications "F40" means 40W 4' Fluorescent

A:  F40 and F34 T12, are the same bulb. They are compatible with each other. The 34 is just a little dimmer then the F40.

A:  did you order it?

A:  These bulbs are dimmable when used with a ballast that allows for dimming and compatible dimmer control

A:  Just checked the website page. Description states base is G13.

A:  These bulbs have a G13 base. We'll get this corrected ASAP. Thank you for bringing to our attention

A:  T12 40 watt is what I bought.