DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Electrical and Wiring > BR30 in BR40 socket

Help Support House Repair Talk by donating using the link above.
Thread Tools Search this Thread
Old 12-19-2013, 05:07 AM  
Junior Member
Join Date: Dec 2013
Posts: 1
Default BR30 in BR40 socket


What are the disadvantages of putting a BR30 lamp in a BR40 socket? CREE now makes a reasonably-priced 65W equivalent LED lamp -- but only in the BR30 size, whereas my fixtures take BR40s.

telemachos is offline  
Reply With Quote
Old 12-19-2013, 08:28 PM  
Contractor retired
nealtw's Avatar
Join Date: Nov 2010
Location: Upper Fraser Valley, British Columbia
Posts: 23,705
Liked 3052 Times on 2671 Posts
Likes Given: 5039


The 30 and 40 are the size of the bulb in 1/8 so 30 x 1/8 =3.75 inches and 40 x 1/8 = 5 inches. The smaller bulb will have a smaller foot print of light , if I can say it that way.
And welcome to the site.
nealtw is online now  
Reply With Quote
Old 12-20-2013, 10:43 AM  
Senior Member
Join Date: Apr 2013
Posts: 171
Liked 29 Times on 26 Posts
Likes Given: 6


LED Lamp.... I've done a bit of work designing those... it's ALL about the heatsink, if it's reasonably priced it probably doesn't have an adequate heatsink schema... but maybe with the extra 10/8ths for air flow due to the smaller size bulb, you're use period won't be cut down too much. Remember LEDs DIM (change color & lumen output decrease) long before they die just like Plasma TVs do but it's so slow you probably won't notice as the PN junction breakdown is very slow as long as it's cooled properly. A well cooled high output LED can last 1m hours with <10% decrease/chagne but it has to be in high air flow with a head spreader the size of a paper plate.

I find LED lights work well in fan bases presumably because of the higher airflow and not so well in sideways enclosed light fixtures.
10/11: Bought the perfect house, 11/12: 10k & 200 hours,08/13: 30k & 400 hours into the perfect house, 12/13: 35k & 500 hours,02/14: 37k & 550 hours, 08/14: 38k & 650 hours
05/15: 40k & 700 hours and I think it's done, Home appraised +40k!!! 1 to 1 ratio achieved!
03/16: Filed small claims court on contractor for siding + all of previous
gottodo1 is offline  
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Similar Threads
Thread Thread Starter DIY Home Repair Forum Replies Last Post
Socket replacement kel789 Electrical and Wiring 5 12-08-2016 08:53 AM
Sliding Socket Outlets JoseG25 Electrical and Wiring 8 12-01-2015 11:24 AM
Why is my kitchen socket beeping? Paul in Maryland Electrical and Wiring 8 03-27-2012 01:13 PM
BR30 and BR40 light bulbs tractng Electrical and Wiring 7 02-15-2010 07:25 PM
Extension and Shallow Socket Nowell General Chit-Chat 1 07-22-2008 05:54 PM

Newest Threads