2

I made a "shop lamp" out of an LED strip and power supply. When I plug it in there is a 1-2 second delay before the lights are powered up. Do some transformers have a shorter delay than others?

shop light

  • 2
    I just don't feel your pain, I guess. Is a 2 second turn-on delay (if it's even that long) really cramping your style that much???? Beats half an hour waiting for ice-cold fluorescent bulbs to finally make it to full brightness by a few miles... – Ecnerwal Mar 13 '15 at 1:20
  • @Ecnerwal ... I feel your pain there ... I have that problem with my fluorescents in the garage in the winter time. I've been thinking of doing away with them and going to a large amount of LEDs to make up the light. – Pᴀᴜʟsᴛᴇʀ2 Mar 13 '15 at 13:30
  • 1
    Well--I have LED bulbs throughout my house that turn on instantly. – Michael Schmitz Mar 13 '15 at 14:35
  • The other issue is that when I turn on my light, I lose all my radio reception. I'm hoping a higher-quality transceiver would address that problem as well. – Michael Schmitz Mar 13 '15 at 14:36
  • 1
    It's not a transformer causing the delay. Likely a capacitor charging or an SCR waiting for voltage to stabilize before letting power out to your LED's. – Wayfaring Stranger Jan 1 '16 at 15:59
1

The more 'electronic' a power supply, the longer it takes to start up. I had this nuisance in my pantry, where I only need light for a few seconds, so I don't want to wait another few seconds every time. I also have a VERY high current demand from a lot of LEDs in total.

I used a sealed lead acid battery on a trickle charger, and a relays. Battery is on common. NO is connected to LEDs. NC to a trickle charger.

Yeah. I'll have to replace the battery when it goes out. Beats waiting for a power supply to ramp up.

Long term, I think I'm going to make a service grade (100-400A) 12/24/48v DC bus for the house, with capacitors for buffering.

You might try a very simple 120vAC to 12vAC transformer (assuming thats your LED's voltage) with a rectifier and capacitor in some enclosure. You're building electrics at that point, so test, and include fuses, etc.

0

There are fast-start power supplies, and those which are less fast. The latter tend to be less expensive as well so paying more might get you faster response. Or might not.

I have an LED-equipped light fixture in my living room, about 300W-incandescent equivalent, which starts instantly and is dimmable. It cost me about $300 just to put those bulbs into it.

But yours is what it is, and the only way you'll improve it is to replace it -- which means finding a way to return it, or selling it off to someone else who's willing to tolerate the pause, or learning to tolerate it yourself. Wish I could tell you otherwise, but...

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.