Sponsored by JLCPCB ($2 for 10 Boards): https://jlcpcb.com
This is a difficult thing to do and my results weren't very convincing. But if you're interested in the theory, take a look 🙂
UNI-T UT383 on Banggood: https://ban.ggood.vip/3eni
Nature Element Measurements page: https://ban.ggood.vip/4r3s
APP link: https://ban.ggood.vip/4r81
Banggood Black friday: https://ban.ggood.vip/78vz
Banggood RC Black Friday page:https://ban.ggood.vip/78w0
https://www.sainsburys.co.uk/shop/gb/groceries/light-bulbs/sainsburys-home-bulb-led-filament-standard-60w-bc-132041576-p
This is a difficult thing to do and my results weren't very convincing. But if you're interested in the theory, take a look 🙂
UNI-T UT383 on Banggood: https://ban.ggood.vip/3eni
Nature Element Measurements page: https://ban.ggood.vip/4r3s
APP link: https://ban.ggood.vip/4r81
Banggood Black friday: https://ban.ggood.vip/78vz
Banggood RC Black Friday page:https://ban.ggood.vip/78w0
https://www.sainsburys.co.uk/shop/gb/groceries/light-bulbs/sainsburys-home-bulb-led-filament-standard-60w-bc-132041576-p
1 JOHN 1:5
This is the message we have heard from Him and announce to you, that God is Light ,and in Him there is no darkness at all.
thank you
I think the measurement is right because the meter has a tolerance level around 3%
Why didn't you use a torch?
Excellent coverage of the subject, making it easy for all to understand. Thanks!
Hello. Good thinking, but….this 0.282 is the diameter and not the radius……with whatever that might mean.! Good job
retest incand bulb ,, huh
Your formula for calculating the area of a circle is incorrect.
It should be "A=πr2".
It is not "A=4πr2".
Not sure why I managed to remember a formula from my school days of about 4 decades ago, a formula that I hardly ever need to use, but there you have it.
The problem with LED replacements for automotive signal lamps is the reflector is designed to work with a specific filament location.
Your light meter is similar to my own so it may have an adjustment feature which will allow you to calibrate it and is ideal for when there is some ambient light in your test area. Set the meter up, adjust the reading to zero and then switch on the light source under test.
Very nice video
28.2cm or 11.10” or 11” 3.5/32” to determine Lux
Never been any good at math. I was able to count may wages and my change from shopping, but square roots and bla bla bla was not needed in my daily thoughts until I watched this.Thx, nicely explained.
I searched high and low, you are the only person that answered all my questions. I just got a par meter today and was wondering light distance from light source to my meter. 11 inches. I figured 12 so I was close. Ty so much
Nice effort.
I've always wanted to know at what distance these lumen counts on the light bulb packaging was taken and now I know thank you.