D7BCT datasheet(23/54 Pages) OSRAM

23 / 54 page

1. General

OSRAM DULUX® EL – electronic energy saving lamps

Economical alternatives to ordinary light bulbs

Technical Guide

1.4

Economy

1.4.1 Comparison of

operating costs

OSRAM DULUX® EL consumes only about one fifth of the electricity of ordinary light

bulbs of comparable light output. These savings from low energy consumption is an

important aspect in cost/benefit analyses. In commercial applications, the price of the

lamps and their maintenance costs also play a role. A comparison between the opera-

ting costs of incandescent lamps and those of the OSRAM DULUX® EL range shows

that because of the lower electricity costs and longer life of OSRAM DULUX® EL lamps

there are considerable benefits despite the higher purchase price. What’s more, there

are savings in maintenance costs (labour costs for replacing lamps), which are much

higher for incandescent lamps because of their shorter life, and possible savings in air-

conditioning costs.

Table 1: Savings in operating costs with an OSRAM DULUX® EL LONGLIFE 15 W

compared with a 75 W light bulb

Fig. 1: Comparison of operating costs, price of electricity:

€ 0.13

Operating time

in years

Cost in

€

Incandescent lamp 0.87 11.49 22.11 32.73 43.35 53.97 64.59 75.21 85.83 96.45 107.07 117.69 128.31 138.93 149.55 159.30

OSRAM DULUX EL 9.95 11.90 13.85 15.80 17.75 19.70 21.65 23.60 25.55 27.50 29.45 31.40 33.35 35.30 37.25 39.20

Lamp

OSRAM DULUX® EL

Incandescent

LONGLIFE

lamp

Power input

15 W

75 W

Quantity

Hours burned

15000 h

Life/lamp

15000 h

1000 h

Electricity consumption over 15000 h

225 kWh

1125 kWh

Electricity costs at

€ 0.13/kWh

29.25

€

146.25

€

+ lamp price1)

9.95

€

13.05

€

(1 x 9.95

€)

(15 x 0.87

€)

= Total costs

39.20

€

159.30

€

Savings per OSRAM DULUX® EL LONGLIFE

120.10

€

–

1) Recommended retail price in Germany

200

180

160

140

120

100

Glühlampe 75 W

DULUX EL 15 W

Ersparnis

Hours burned (1000)

Comparison of operating costs between an OSRAM DULUX® EL LL 15 W and a 75 W incandescent lamp

Incandescent

lamp 75 W

OSRAM DULUX®

EL 15 W

Savings

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