We now have 44 of these Long Life Lamp Company GU10 LED bulbs and they are excellent. We have a combination of two types:
- PURE WHITE (in the kitchen and bathrooms): GU10 5W LED Super Bright PURE WHITE Colour 55w Replacement for Halogen bulb with New SMD Chip Technology 400 Lumens
- WARM WHITE (in all other rooms): Long Life Lamp Company GU10 5 Watt Super Bright LED with New Chip Technology, Warm White 50w replacements
After initially thinking we'd use Pure White everywhere (as it looks brighter), after trying some in the bedrooms and hallways we found the light too stark and went for Warm White for those areas instead. This aligns with many other reviews I've seen - it seems this is the combination most people opt for in the end.
Overall I've researched about 300+ different GU10 LED bulbs online and tried 7 different samples for real, and I think these are the best. I calculate that at they current price £8.95 they pay back in under 1800 hours use - well under 3 years if they are on for 2 hours a day on average.
If you're looking for GU10s to replace 50W Halogen ones then consider the following:
1) Light output: These are 400 Lumens and, to my eyes, very similar light level to 50W Halogens. Many other 5W LED bulbs offer lower Lumens output. I've tried others are they look obviously dull.
2) Length: Standard Halogen GU10s are 50mm diameter x 55mm long (to the end of pins). Many bright LED ones are much longer than this and may not fit in your holders. These are 50x50 so fit fine - a genuine like for like replacement.
3) Colour (of the light): This is measured in Kelvin but manunfacturers give names to different levels. Standard halogens are (all, I believe) around 2700K - "Warm white". That is a yellow type of white. I tried some 6000K ones but that's a very harsh white like an operating theatre - too stark for me.
After much experimentation we settled on:
- 4000K (Pure White) in the kitchen and bathrooms (GU10 5W LED Super Bright PURE WHITE Colour 55w Replacement for Halogen bulb with New SMD Chip Technology 400 Lumens
- 3000K (Warm White) in all other rooms (Long Life Lamp Company GU10 5 Watt Super Bright LED with New Chip Technology, Warm White 50w replacements
4) Beam angle. Many bright LEDs seem to have narrow beam angles (e.g. 90 degrees or less), which creates a spotlight. I am after general purpose room lighting and these are 120 degrees, which is a nice wide angle.
5) Average life. Many LEDs have a stated life of 50,000 hours. These are lower - 30,000 hours. However I can live with this given that the payback period is only 1800 hours!
There is only one tiny downside I can find - sometimes when you move something (e.g. wave briskly) you notice a slight strobing effect (the LEDs are obviously pulsing fast rather than permanently on - presumably at 50Hz mains, whereas you don't notice this with Halogens as the element stays hot between the 50Hz cycles). I don't notice it often, and it isn't a problem for me, but if you're planning to put these bulbs somewhere where things move fast (e.g. a gym) you might want to try a single bulb as a sampler first.
In summary - I think these bulbs are excellent - a genuine replacement for halogen GU10s, and consume only 10% of the power! I calculated payback in under 3 years based on 2 hours usage per day, but prices are dropping already so you're on to a winner!
(edited from my earlier review of the Pure White bulbs)