לקוח דונו חקיקה lux unit of light ריק ביטול שתיים עשרה
Candela vs Lux vs Lumens — 1000Bulbs.com Blog
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Unit Of Light - How Is Light Measured? (Light Units Table)
Lux The lux (symbol: lx) is the SI unit of illuminance and luminous emittance, measuring luminous flux per unit area.[1] It is equal to one lumen per square. - ppt download
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