How many lumens and what beam angle for LED

largeloins

I've found a comparison :-)
http://www.thegreenage.co.uk/article/cost-comparison-led-spotlight-versus-halogen-spotlight/

almillar

largeloins - I agree with locky. Your transformer MAY work with the LEDs, or it MAY not. Or it MAY work for a couple of hours, or flicker. You need to install them to find out.
OR, convert over to GU10, more common, and they run on AC (transformer is built in) so there's no hard to find transformer to fiddle with.
How much will you save? Like for like, you'll want an LED that's around 500 lumens (like, actually 500 lumens, not the lies that some eBay sellers give) and the same beam angle and colour rendering index (CRI) as your halogens. That's often 60 degrees, and look out for low (under 90) CRI numbers.
So it depends on what bulb(s) you buy. You'll be going from 50W to, let's say, 5-10W, so whatever you pay now, you'll be paying a tenth to a fifth of it.
Just don't kid yourself into buying a low wattage LED that doesn't match the light output of the halogens.

JohnB47

almillar wrote: »

largeloins - I agree with locky. Your transformer MAY work with the LEDs, or it MAY not. Or it MAY work for a couple of hours, or flicker. You need to install them to find out.
OR, convert over to GU10, more common, and they run on AC (transformer is built in) so there's no hard to find transformer to fiddle with.
How much will you save? Like for like, you'll want an LED that's around 500 lumens (like, actually 500 lumens, not the lies that some eBay sellers give) and the same beam angle and colour rendering index (CRI) as your halogens. That's often 60 degrees, and look out for low (under 90) CRI numbers.
So it depends on what bulb(s) you buy. You'll be going from 50W to, let's say, 5-10W, so whatever you pay now, you'll be paying a tenth to a fifth of it.
Just don't kid yourself into buying a low wattage LED that doesn't match the light output of the halogens.

And just to add, if I may, buy from someone who offers a good returns and guarantee policy. You really need to try these things out. There's a lot of rubbish out there.