Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and our Privacy Policy.
OK
Index  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Guest
New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Register to forums    Log in

 
FORUMS General Gear Talk DIY & Customizing 
Thread started 12 Mar 2017 (Sunday) 11:42
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

DIY strip light

 
Ltdave
Goldmember
2,600 posts
Gallery: 20 photos
Likes: 503
Joined Apr 2012
Location: the farthest point east in michigan
     
Mar 12, 2017 11:42 |  #1

i remember reading on POTN about DIY strip lights and (as an electrician i know a little bit about this stuff) it was mentioned that fluorescent tubes fired by an electronic ballast (usually the newer T8 tubes) if you want any sort of consistent white balance...

has anyone experimented with the latest and greatest LED tubes? we're in the process of retrofitting one of our plants with these in place of the T8s we installed not 7 years ago. some of them you can purchase can be wired into any fixture by bypassing the ballast so those old 4' shop lights with T12 tubes can be used saving BIG Dollars. i think the LEDs were using are $10 a tube or less...

they also make them with a dimmable feature for under $30-35 so i think this could be the next big breakthrough in cheap lighting...

of course this is all dependent on the LEDs being consistent color temperature-wise...




  
  LOG IN TO REPLY
Luckless
Goldmember
3,061 posts
Likes: 184
Joined Mar 2012
Location: PEI, Canada
     
Mar 22, 2017 12:18 |  #2

A big thing to remember to look out for on Dimmable LEDs are frequency dimming by PWM (Pulse Width Modulation) - Some are decent and use a very high frequency pulse so that you get several cycles in any given shutter speed duration you might want to use, which means you get nice and even lighting. Others use weird and very low frequency to achieve dimming, which leads to excessive flicker. I've seen a few cheap ones that were so bad that you could clearly see the pulses with the naked eye.


As for the usage in photography, I have found that the few I've been around seem to suffer from issues of hot-spotting. I had seen one installation that used a board with this massively dense array of super tiny LEDs - like almost on a scale that you might expect an old character based LCD/LED displays, which made for something with fairly even lighting when behind a diffusion panel, but others were only a dozen or so big LEDs spaced out down the line, which made for big bright points that looked hard to diffuse properly.


Canon EOS 7D | EF 28 f/1.8 | EF 85 f/1.8 | EF 70-200 f/4L | EF-S 17-55 | Sigma 150-500
Flickr: Real-Luckless (external link)

  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)

1,408 views & 1 like for this thread
DIY strip light
FORUMS General Gear Talk DIY & Customizing 
AAA
x 1600
y 1600

Jump to forum...   •  Rules   •  Index   •  New posts   •  RTAT   •  'Best of'   •  Gallery   •  Gear   •  Reviews   •  Member list   •  Polls   •  Image rules   •  Search   •  Password reset

Not a member yet?
Register to forums
Registered members may log in to forums and access all the features: full search, image upload, follow forums, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, all settings, view hosted photos, own reviews, see more and do more... and all is free. Don't be a stranger - register now and start posting!


COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and to our privacy policy.
Privacy policy and cookie usage info.


POWERED BY AMASS forum software 2.1forum software
version 2.1 /
code and design
by Pekka Saarinen ©
for photography-on-the.net

Latest registered member is MerrittRuecker
797 guests, 338 members online
Simultaneous users record so far is 6430, that happened on Dec 03, 2017

Photography-on-the.net Digital Photography Forums is the website for photographers and all who love great photos, camera and post processing techniques, gear talk, discussion and sharing. Professionals, hobbyists, newbies and those who don't even own a camera -- all are welcome regardless of skill, favourite brand, gear, gender or age. Registering and usage is free.