GU10 LED Bulb Review
So what type of LED GU10 and MR16 bulbs are available?
Unlike old type halogen GU10 bulbs there's a huge amount of choice
when choosing an LED GU10 bulb or MR16 replacement. We decided to write
this GU10 LED bulb review to outline the differences between our LED
spotlights to help our customers make an informed decision when buying a
replacement LED bulb. There are four main factors to consider when
choosing a suitable LED replacement bulb:
- Light colour
- Total light output (luminous flux)
- Spread of light (beam angle)
- Bulb dimensions
LED Light Colour
Most white light LED GU10 bulbs emit a light colour ranging from
"warm white" to "cool white". Warm white is slightly yellow similar to
light emitted by a halogen or filament bulb. Cool white has a slight
blue tint and is rarely used for domestic lighting purposes. In between
these two we have pure white. Pure white is just that - a clean white
light with no yellow or blue tint. The kelvin scale is used as a measure
of light colour, warm white ranges from about 2800k to 3800k, pure
white or daylight from about 4800k to 6000k, and cool white starts from
around 6000k upwards. Between warm white and pure white (3800k and
4800k) there is a fourth shade of white called medium white, commercial
white or natural white, although it's a relatively new shade of white
it's already proving to be our most popular.
Total light output (luminous flux)
A common question is which LED GU10 bulb is equivalent to a 50 watt
halogen GU10 bulb in terms of light output. A 50 watt halogen bulb
produces approx 12 lumens per watt giving a total light output of around
600 lumens. Some of this light is lost through the back of the bulb
leaving approximately 550 lumens of usable light. Our LEDs produce up to
100 lumens per watt, generally the higher the power/wattage the higher
the light output. We state the lumens output on all our GU10 and MR16
led product pages. From this you can work out how much light the
replacement LED GU10 will produce compared with an old halogen.
Although LEDs don't produce much heat they can overheat in operation
if they're not cooled correctly. Operating above 60°C generally damages
the LED shortening its life, reducing light output and efficiency. The
higher the wattage/power of the GU10 LED bulb the more heat it produces
requiring more cooling fins etc on the bulb body to keep the LEDs cool.
Therefore beware of bulbs that don't have a well ventilated body. This
heat loss requirement limits the wattage/power of the GU10 LED bulb
and therefore light output of GU10 and MR16 LED replacement bulbs. The
bulb body of a GU10 or MR16 becomes too large and may no longer be a
suitable replacement for a halogen bulb when the LED power reaches over 5
watts.
There is more to consider than just total light output (luminous
flux) when considering how a bulb will light a room. Our 5 Watt GU10 LED
Bulb producers almost as much light as a 50W GU10 halogen, however
thanks to its clever light reflector design it spreads the light more
evenly over an improved 90° light beam angle, lighting the room more
efficiently. The lit space is actually brighter on average using our 5 Watt GU10 LED Bulb compared to a 50 watt GU10 halogen bulb.
Spread of light (beam angle)
Another benefit with GU10 and MR16 LED bulbs
is there's a choice of beam angle. Generally our SMD (surface mounted
diode) LED bulbs produce a wide spread of light with a beam angle of
around 120°. Our Large Diode bulbs offer a more focused beam of around
60° (old halogen 50 watt GU10 and MR16 bulbs had a beam angle of about
60°). The best, most even 60° light beam is produced by our 6 watt COB GU10 LED Bulb.
The resulting effect of a narrow beam angle is to light a smaller
area to a higher light intensity, lighting the work space more than the
walls of a room when used as downlights.
Bulb dimensions
It's worth checking the dimensions of the LED bulb to ensure it will
fit inside the original bulb housing or light fitting. If fitted in the
ceiling check the height of the ceiling void is adequate for the length
of the bulb. While the diameter of the bulb face is always 50mm for GU10
and MR16 bulbs the length and width of the bulb body varies. On our
website we provide technical drawings of all our LED GU10 and MR16
bulbs. If however you purchase an LED bulb and find it's not suitable,
simply return it to us for a refund
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