LED Light Bulb facts

Before you buy facts

Light Output

The most important thing to know before replacing your inefficient incandescent light bulb is to make
sure the replacement LED bulb has the same light output as your exising bulb.

Incandescent lamps generate light by heating the filament to a very high temperature so that it glows to
a warm yellow light. Incandescent light is highly inefficient, as about 95% of the energy input is emitted
as heat.

A 100 watt 230 volt incandescent light bulbs generates around 1350 lumens of light. (13.5 lm/W) This is
emitted in an 300° spread.

  • Enerx 9 watt LED bulb has an output of 800 Lumens
  • Enerx 12 watt LED bulb has an output of 1000 Lumens
  • Enerx 14 watt LED bulb has an output of 1250 Lumens

See the charts below for comparisons with other types of bulbs.

Light Source Lifespan Hours Lumens / Watt
Incandescent
1000 8 - 14
Halogen 
4000 15 - 20
Fluorescent 
8000 35 - 50
LED 
25000 60 - 100

Fig1

Lux

Lux is the unit of luminous flux per square metre. It is the measure of the intensity as perceived by the
human eye, of light that hits a surface. E.G. The amount of light that hits a surface or brightness of light
source.

One lux is equal to one lumen per square meter. 1 lx = 1 lm/m²

Beam Angle

The beam angle is the angle of light from the light source.
Incandescent and Compact Fluorescent Light (CFL) = 300°
Enerx LED = 150°

The below chart is the Lux output of ceiling mounted lamp holder at 2.4 meters with different bulbs.

Light Bulb Type Lux Output 300º enerx Led Lux Output 150° Lux Output 230°
15W CFL 54      
75W Bulb 40 9W 53  
20W CFL 70      
100W Bulb 60 12W 65  
    14W
64

The below chart is the Lux output of different bulbs in a recessed ceiling light at 2.4 meters

Light Bulb Type Lux Output 300º enerx Led Lux Output 150°
15W CFL 29    
75W Bulb 33 9W 37
20W CFL 48    
100W Bulb 43 12W 46

As you can see in the above charts the enerx 9W Led bulb has the same output light as an 75w
incandescent bulb and the 12W Led bulb has the same output light as an 100W incandescent bulb
when installed in a recessed down light.

Output Colour

Colour temperature is a characteristic of visible light that has important applications in lighting.
Colour temperature is conventionally stated in the unit of Kelvin. (K)
Incandescent light bulbs only product a warm white colour of 2700 - 3300K

Enerx LED bulbs are available in two colour options.

  • Warm white 2700 - 3200K
  • Natural white 3800 - 4500K

The warm white LED bulb is ideal for lounges, hallways and bedrooms where people relax.

The Natural white colour is a white light making them ideal for kitchens, bathrooms, laundries, Offices
and Workshops.

Beware of cheap LED bulbs on the market that have a colour temperature of 6000k. These are not
suitable for residential lighting.

Size of Lamps

The traditional incandescent light bulb has a size of A19. A = Appliance and 19 = diameter of bulb in
multiples of 1/8 inch. 19 x 1/8" diameter is 2 ,3/8 inches or 60.0mm.

Beware of LED bulbs on the market which have a lot bigger diameter, some as large as 90.0mm.
The enerx LED bulbs are compact in size with a diameter of only 63.0mm making them combatable
with traditional light fittings.

As seen in the above charts the enerx 9W LED bulb is equivalent to a 75W incandescent and the enerx
12W LED bulb is equivalent to a 100W incandescent.

Buyers beware of low cost unlabelled LED bulbs on the market that say they are equivalent to a 60W
incandescent bulb but only generate about 400 Lumens.

According to European Union Standard an energy efficient bulb that claims to be equivalent of a 60W
tungsten bulb must have a minimum light output of 700 - 750 lumens.

Life Span

All light bulbs have to have a rated life span in hours. This is the average life range of a bulb before it
starts to deteriorate. As you can see in Fig 1 the average life span of light bulbs are as follows.

Incandescent Bulb
1000 hours
Halogen light Bulbs
4000 hours
Compact Fluorescent lamps
8000 hours
LED Light Bulbs
25000 hours

Warranty

All enerx LED light bulbs come with a 3 Year manufactures quality guarantee.
Beware of cheap LED bulbs with limited warranties.

C-Tick

All Enerx LED light bulbs are C-Tick compliant. This ensures that they are electrically safe to use, meet all
New Zealand relevant standards and don't produce any harmful radiation.

Conclusion

Enerx light bulbs have the latest led technology. They are a superior compact bulb, manufactured from
aluminium and glass with a fireproof plastic base. They have excellent heat management and thermal
conductivity.

  • 9w at 150° is equallient to 75w incandescent or 15w CFL bulb
  • 12w at 150° is equal lent to 100w incandescent or 23w CFL bulb
  • 14w at 230° is equivalent to 100w incandescent or 23w CFL bulb when ceiling mounted.