LED / COB; have I a dude one?

[Rekusu]

What ho one and all,

We have a couple of floor lights that have 300w halogen bulbs running through a dimmer. The give a lovely light when bounced off the ceiling, but the cost of running 300w sets my teeth on edge.

So I recently bought a 12W LED / COB (dimmable) replacement, that apparently is around 1000 lumens. It is probably not 1000lms, but should be sufficiently bright.

However, it is not what I would call, very bright, and it flickers. My guess is the halogen dimmer is not suitable for LED and/or, the dimmer is reducing the brightness.

I don't need it to dim, but was wondering if taking the dimmer out of the line, the bulb would be brighter?

 

[winston1]

Try it then.

 

[ETAF]

1000lm 12W seems more like 100W bulb than a 300W bulb
or 10,000 Lm
https://www.screwfix.com/p/sylvania...0w/895fx#product_additional_details_container

Watt to Lumen calculator
https://www.rapidtables.com/calc/light/watt-to-lumen-calculator.html

 

[Rekusu]

Thanks for the link to the lumen calculator. Quite useful.

Certainly, I did not expect the output to be similar to a 300w halogen, but did expect it to 'appear' more than it does. The other issue of course, is with downlighters, they appear bright and are illuminting via direct light. With thei lamp, it bounces off the ceiling so obviously, there will be an illumination reduction.

Will take the dimmer off line and see if there is an improvement.

 

[Rekusu]

Installed the COB LED via a chock-block and the output looked very similar to when running through the dimmer.

Using the above linked calculator, seems that the original 300 w halogen is around 6000lu. so I am unlikely to get that kind of output from a 12w LED.

So will probably reinstall the halogen.

 

[Robin0577]

Very rough guide for halogen vs. (present technology) LED is about 6:1, in other words you'd expect to be looking for about a 50w LED to replace a 300w halogen.

 

[fluorescence]

300w halogen bulbs running through a dimmer. The give a lovely light when bounced off the ceiling, but the cost of running 300w sets my teeth on edge

When dimmed they will not be drawing 300w. I would use a power meter to see what they actually draw when dimmed to see if all the messing about with inferior LED replacements is really worth it

 

[Taylortwocities]

Most legacy dimmers need a load of at least 40watts to make them work. You are only loading up about 12W that's why you are getting flickering.
You need a trailing edge dimmer suitable for dimming LEDs. The Varilight V-PRO range are good at the job.