LEDs: "wattage" redefined

[Bob Engelhardt]

I got these LED floodlights for free - "24 watt, 12 - 30v". I put one
on a bench supply & checked the current: 500ma @ 12v - 300ma @ 30v. OK
- they were free, otherwise I'd be pissed.

 

[Michael A Terrell]

Bob Engelhardt wrote:

I got these LED floodlights for free - "24 watt, 12 - 30v". I put one
on a bench supply & checked the current: 500ma @ 12v - 300ma @ 30v. OK
- they were free, otherwise I'd be pissed.

Are you sure that 24 Watt isn't the equivalent to an incandescent lamp?

 

[Jim Thompson]

On Sun, 31 Dec 2017 08:53:09 -0500, Bob Engelhardt
<BobEngelhardt@comcast.net> wrote:

I got these LED floodlights for free - "24 watt, 12 - 30v". I put one
on a bench supply & checked the current: 500ma @ 12v - 300ma @ 30v. OK
- they were free, otherwise I'd be pissed.

Maybe it's referring to incandescent equivalent?

...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| STV, Queen Creek, AZ 85142 Skype: skypeanalog | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

It's what you learn, after you know it all, that counts.

 

[Bob Engelhardt]

On 12/31/2017 11:05 AM, Michael A Terrell wrote:

Are you sure that 24 Watt isn't the equivalent to an incandescent lamp?

Oh, no ... there are 6 dice & quite a bit (new unit) of light. Spec'ed
as 2400 lumens, but with 6 actual watts, 600 lumens is as much as could
be expected.

 

[Bret Cahill]

I got these LED floodlights for free - "24 watt, 12 - 30v". I put one
on a bench supply & checked the current: 500ma @ 12v - 300ma @ 30v. OK
- they were free, otherwise I'd be pissed.

Many labels/stickers on lighting made in China are inaccurate. The goal in China is to get the stuff out of the door ASAP and they really care if it makes much sense.

I once found a CFL that had no name of/for the manufacturer on either the packaging or bulb. It wasn't just an off brand. It had no brand at all, just "Compact Fluorescent Light" on the package.

 

[Michael A Terrell]

Bob Engelhardt wrote:

Michael A Terrell wrote:

Are you sure that 24 Watt isn't the equivalent to an incandescent
lamp?


Oh, no ... there are 6 dice & quite a bit (new unit) of light.
Spec'ed as 2400 lumens, but with 6 actual watts, 600 lumens is as
much as could be expected.

Be expected by you, or by the seller? ;-)

 

[Mitch Crawford]

In article <s_h2C.23470$ET6.9662@fx38.iad>,
Michael A Terrell <mike.terrell@earthlink.net> wrote:

Bob Engelhardt wrote:

Michael A Terrell wrote:

Are you sure that 24 Watt isn't the equivalent to an incandescent
lamp?


Oh, no ... there are 6 dice & quite a bit (new unit) of light.
Spec'ed as 2400 lumens, but with 6 actual watts, 600 lumens is as
much as could be expected.

> Be expected by you, or by the seller? ;-)

They have darker rooms in China to measure them.

Mitch

--

mitch@sand-hill.uk

 

[Michael A Terrell]

Mitch Crawford wrote:

In article <s_h2C.23470$ET6.9662@fx38.iad>,
Michael A Terrell <mike.terrell@earthlink.net> wrote:
Bob Engelhardt wrote:

Michael A Terrell wrote:

Are you sure that 24 Watt isn't the equivalent to an incandescent
lamp?


Oh, no ... there are 6 dice & quite a bit (new unit) of light.
Spec'ed as 2400 lumens, but with 6 actual watts, 600 lumens is as
much as could be expected.


Be expected by you, or by the seller? ;-)

They have darker rooms in China to measure them.

Or their Lumens are metric... ;-)

 

[default]

On Sun, 31 Dec 2017 08:53:09 -0500, Bob Engelhardt
<BobEngelhardt@comcast.net> wrote:

I got these LED floodlights for free - "24 watt, 12 - 30v". I put one
on a bench supply & checked the current: 500ma @ 12v - 300ma @ 30v. OK
- they were free, otherwise I'd be pissed.

I've got what appears to be a genuine 20W LED flood lamp. (120VAC)

big cast aluminum heat fins surrounding the emitter.. and the "circuit
on board" emitter actually puts out enough IR radiation to feel if
you're just an inch away... (wouldn't be enough to keep a salamander
happy, but I can feel it on the back of my hand, and the light out is
blinding from 50 feet and closer)