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Lumen equivalents of halogen floods v Led

hertzal123
I am trying to find a replacement for 300W halogen floods.A search online gives halogen 300w as 5000/6000Lm.Looking at a Luceco  led flood in electrifix

catalogue,it claims 22W is equivalent to 300W halogen,but they only give 1800 Lm,so how can they be as bright as the 300W halogen?

Thanks for any help.

                                    Regards,

                                                Hz.
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  • 0
    broadgage:

    . . .

    The light output of the halogen floodlights tends to be exaggerated also, but not as badly. It is common practice to take the LAMP output without any allowance for losses in the cheaply made reflector and cover glass.

    . . .


    I think Broadgage has a good point here. 5 to 6 thousand lumens sounds about right for the actual 300 W halogen lamp. In the fitting a sizeable portion of this light will need to be reflected and the efficiency of the reflective material comes into consideration, so the actual lumens emitted by the fitting will be rather less. Whereas light emitting diodes are intrinsically directional, and the figures quoted probably refer to the entire fitting.


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  • 0
    broadgage:

    . . .

    The light output of the halogen floodlights tends to be exaggerated also, but not as badly. It is common practice to take the LAMP output without any allowance for losses in the cheaply made reflector and cover glass.

    . . .


    I think Broadgage has a good point here. 5 to 6 thousand lumens sounds about right for the actual 300 W halogen lamp. In the fitting a sizeable portion of this light will need to be reflected and the efficiency of the reflective material comes into consideration, so the actual lumens emitted by the fitting will be rather less. Whereas light emitting diodes are intrinsically directional, and the figures quoted probably refer to the entire fitting.


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