400W LED flood lights

How Many Lumens Is A 400 Watt Metal Halide?

To better understand this, let’s look at an example. Say we are considering replacing a 400W metal halide flood light with a Razorlux LED flood lights . The initial lumens for a 400W metal halide lamp is approximately 36,000.


This is the amount of light that is produced the first time the lamp is turned on. All lamps have some form of lumen depreciation. A better gauge for the lumen output of a particular lamp is the mean lumens.


Mean lumens typically list the lumen output left when a lamp reaches 40% of its rated life. The mean lumens for the 400W metal halide lamp is approximately 24,000.

In fact, there is an auxiliary effect of Razorlux. In addition, the lighting effect of the other lamps is not just a problem of simple luminous flux, but also a problem of maintenance factor and utilization factor.


In short, this is an organic combination of the whole, not a simple luminous flux problem.

400w metal halide

Definition of luminous flux

Luminous flux refers to the illuminance received per unit area of the surface of the subject, expressed as (lux). The greater the luminous flux, the higher the brightness. The luminous flux is closely related to the power of the light source.

Luminous flux = power × luminous efficiency. That is lumens (Lm) = power (W) × light efficiency (Lm/W).

Luminous flux of 400w metal halide lamp=400w × light effect (Lm/W)

After the parameters such as arc power are determined, the change in luminous flux is basically determined by:

1 change in the light transmittance of the quartz bulb;

2 electrode emissivity The change of filling metal halide, different power, different design structure (including cathode potential drop);

The metal halide lamp of the luminescent element in the arc tube will have a different lumen maintenance rate curve.

400w flood lights

For example, most metal halide lamps have a relatively rapid decrease in luminous flux at the beginning of the lamp ignition point (a few hours and a factor affecting the change of luminous flux at the initial stage of the ignition of the metal halide lamp), and the luminous flux decreases more smoothly after further burning; however, there are also some metals.


The rate of decrease of luminous flux and the rate of decrease of luminous flux at the end of the ignition point of the halide lamp at the initial stage of the ignition point of the arc are basically due to the similar atomic total radiation intensity in the arc tube of the metal halide lamp.


The above differences are mainly due to the luminous flux at the beginning and the end of the ignition.

How bright is a 400 watt metal halide?

A friend of mine had a 1000 watt metal halide he mount in his basement. It did 2 interesting things.

1) we actually could get a sun tan from it. could NOT look at it though. to bright.

2)It made his special plants grow very well thru winter.

Darn electric bill went up quite a bit though. A 400 & 1000 are good bit brighter than the average street light. We installed a good number of the 400s on gymnasium and factory ceilings and they are plenty bright. Much more than a flashlight or street light.

Many people will attempt to do the LED & 1000 watt metal halide lumens comparison. How many lumen do MH lamps produce?


According to our research, the luminous efficiency is about 60 to 110 lm/watt; therefore, a 1000 watt metal halide produces at least 60,000 lumens, or at most 110,000 lumens. Similarly, 400 watt MH produces at least 24,000 and at most 44,000 lumens.

We are LED flood light manufacturer of metal halide replacement and retrofit kits. If you would like to get the quotes or know more about the tips for 400 watt metal halide lumen comparison and LED replacement, please feel free to contact us at email info@razorlux.com .

For 400w led flood light, you may like the following products:

LED Marine Flood Lights 400 Watt 12V

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Field Lights 400W With Meanwell Driver

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