Replacing light bulbs with LEDs - LED lightbulb information

paul cliff

I'm really struggling to find G9 40w replacement LEDs.

Most I can find (of decent quality) seem to be 25w replacements.

Do such a thing exist?

Another question, can I run LED's of a standard dimmer switch if I don't ever dim them, and just use the push in for on/off?

Cliff

Have you looked at these? Claim to be equivalent of a 40w.
KINGSO 10x G9 5W Warm White Dimmable SMD 3014 72 LED 220V lamp Light spotlight 40w Replacement for Halogen bulb 2800k 280 LM Energy Saving: Amazon.co.uk: Lighting

They are dimmable but it is recommended you replace your old dimmer with an LED dimmer.

Using an old type dimmer only works with some LEDs. And it is difficult to know what will work before you buy. If you get the wrong type it can cause the LED or dimmer to fail. Best to buy a new dimmer as old types were designed for incandescent lamps and not electronic types. The dimming method is very different.

Switching on or off is OK but one day some one will dim it by mistake

TJT1

I just did some comparisons on three different bulbs with claimed similar(ish) light output. (The values below are readings from my meter)
Claimed 40W incandescent = 35W, 36VA, giving a PF of about 0.96.
Claimed 9W CFL = 10W, 16VA giving a PF of about 0.6
Claimed 6W filamant LED = 4W, 5VA giving a PF of about 0.75
So by replacing a 60W incandescent with a 4W LED I am reducing my load on the national grid by 31W. OK, I'm getting a bit of current 'for free' but who cares, apart from the tree huggers?

Incidentally,GLT, your explanation of why I leads V in a C, was really good. I was in electronics, mainly radar and comms, from 1961 to 2000, and although I knew it did, I never thought about why. I assume that I lags V in an L because the back emf is greatest, (thus the V difference being minimum and hence I lowest) at maximum rate of change of voltage i.e. zero crossing (now I've been prodded into thinking about it). Does that sound right?

Inked

Sorry, without reading through the whole thread, can someone give me any info on whether I would need to change transformers to change from halogen bulbs to LED equivalent?

Would be looking to replace some under cabinet individual downlights from G4, some individual ceiling downlights from GU10, and some ceiling lights using multiple G9 halogens (these would need to be dimmable)

EDIT: Looks like some LEDs have built in drivers to run off of the 230AC current

Slalom

I can only say I have replaced the GU10 240V Halogens with LED 240V Halogens, several years ago, and I have replaced one in the last 12 months. I have over 20 Led GU10s spread through the house.

I don't know if G4 and G9 240v Led exist, But Google is your Friend.

YourWelcome | LED Strips, LED Bulbs, Halogen Bulbs and Downlights | YourWelcome bricks and clicks near Coventry is the source of my g10's and has g9 in 240v listed but the g4 do not seem be mains versions

I use Light Bulbs & Tubes. LED Lamps. Energy Saving Lights & Light Fittings. to replace cfls as they die.

Wahreo

A website called 'your welcome'

I thought I'd seen it all.

MartinPickering

My welcome?

springtide

As a FYI,

I switched most of my lighting to E27 as its more the European standard and as such more readily available.

I've looked around and have tried a lot of lighting from various places, but convenience opens up by switching to E27... and most importantly IKEA does a large easily available selection of LED lighting that is relatively cheap (not "the best", but good options ad prices)

Stuart Wright

Five years after starting this thread about LED light bulbs, I think most people are using them as standard now.  So I'm unsticking the thread where it will drift into the wind.

springtide

The only non led light I have in the house is in my son's Lava Lamp!
Sail away, sail away....