17 - Friday, October 6. 1989 - North Shore News

Determine how Brighten up the rock garden

much light is meeded in room

WHEN ILLUMINATING a room which is more important, watts or lumens?

By KAREN JORDAN Contributing Writer

Although the layman need not know this distinction, it is an im- portant one in the lighting in- dustry.

B.C. Hydro is currently

cerned with the decorative and enhancement aspects of light.

More recently, the prolo .ged exposure to the cool, poor color rendition of fluorescent fixturing has come under inspection in terms of its effects on quality of en- vironment, and its effects on human productivity.

On the home front, increasing concern over energy cost and availability have given reconsid- eration to factors of wattage,

From page 15 Late-flowering and 12 inches in heizht, the yellow flowers are some of the most fragrant.

Hf you are looking for something really early to brighten up the rock

On Sale:

garden or if you have some well- drained beds in need of something low, n. lobularis is the one. Seven inches high and they replenish the energy back into the bulb. Tying knots will only hinder this process.

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OK, it fit, sore of, but believe me when I say ¢ could fill another two pages with information about these wonderful plants. Well, maybe in another article. And sow it grows.

distributing a Consumer’s Guide to Buying Energy-efficient Appli- ances and Lighting produced by Energy, Mines and Resources Canada. Providing stri:i:7: about lighting terminoik,

lumen output and candlepower. All Stores cpen 7 Days a Week And when concerns of this

nature became universal, the

lighting industry responded.

General Electric is producing

ee City Antiques

simple definitions of «sat. vg lumens, the terms commonly used to rate bulbs.

In fact, the watt is a measure of energy, not of light ovtput. A 40-watt bulb uses 40 watts of elec- tricity no maiter what type of bulb it is. But the same amount of light produced will vary depending on the bulb type.

Light output is measured in ‘lumens.’ A standard 40-watt bulb produces about 450 lumens, whereas a 40-watt fluorescent tube produces about 2,150 lumens — nearly five times as much light.

Determining the amount of light available for vision is a more dif- ficult task, dependent on factors in the immediate area of any given fixture. For instance, a dark shade on a traditional lamp will im- mediately decrease the amount of light falling on a white chair and table.

Should the chair be navy blue

and the table a rich red mahogany, -

a further reduction in available light will occur. Measurable avail- able light can be rated using a light meter, and the reading is in foot- candles, called candlepower. Traditionally, the lighting re- quirements of industry have been overshadowed by efficiency and maintenance cost factors, and res- idential use has been more con-

three of many fluorescent bulbs designed to give more light (lumens) for the wattage consum- ed, and better color rendition due to higher burning temperatures.

The Circlite is a two-piece fluorescent bulb resembling the planet Saturn. The circular bulb attaches to the socket using a plastic strip which locates the tube outside a traditional lamp’s harp, but inside the shade.

There is no change in fixture appearance, just a reduction in energy cost, and long-term bulb replacement cost.

The Circlite consumes 22 watts of energy, has an average life of 1,200 hours, producing an output of 870 lumens. A standard 100 watt bulb has an average iife of 1,000 hours, and produces 1,520 lumens, double the light for five times the energy consumption.

A second bulb, the Biax, is one- third to one-half the size of a con- ventional four-foot fluorescent tube. Consuming 18-39 watts, this versatile bulb delivers 1,250 to 3,150 lumens of light output, and has an average life of 10,000 to

Among its other advantages, the Bizx has a color rendition factor of 82, the standard being incandes-

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