Philips HPI Lamps

Colour Rendering (Ra)

60-69 5
50-59 1
70-79 1

Colour Code

645 3
542 1
642 1
643 1
745 1

Luminous flux (lm)

Wattage VS Luminous Flux

LUMEN	INCANDESCENT	LED	CFL	HALOGEN
200 - 300 Lm	25 Watt	2 Watt	5 Watt	20 Watt
300 - 500 Lm	40 Watt	6 Watt	7 Watt	28 Watt
500 - 800 Lm	60 Watt	9 Watt	12 Watt	42 Watt
700 - 1000 Lm	75 Watt	10 Watt	14 Watt	53 Watt
> 1000 Lm	100 Watt	>15 Watt	>16 Watt	>70 Watt

Luminous flux (in lumens) is a measure of the total amount of light a lamp puts out. Wattage is the amount of watt a bulb uses in 1 hour. We've long identified bulbs by their wattage, but that is actually a measure of electricity, not the brightness of a bulb. The amount of light a bulb generates is measured in lumens. An incandescent 60-watt bulb, for example, gives off 750 lumens of light and LED bulbs can deliver the same amount of light using as little as 9 Watt! The amount of Lumen divided by the wattage will show you which lamps are most energy efficient.