What do numbers on light bulb mean?
What do numbers on light bulb mean?
The code number of a bulb consists of a letter or letters followed by a number. The letter indicates the shape of the bulb and the number relates to the diameter of the bulb in eighths of an inch. The bulb is “A” type and the diameter would be 23/8″. A 65BR40 is a 65 watt reflector 5″ in diameter.
How bright is 25 watts?
Energy Star Bulbs
| Watts (energy usage) | Lumens (light output) |
|---|---|
| 25 | 200 |
| 35 | 325 |
| 40 | 450 |
| 60 | 800 |
Is 30w light bright?
How bright is a 30w LED floodlight? A 30w LED floodlight is usually equal to a 300w halogen floodlight. Top-spec 30w LED floodlights such as Osram are 100 lumens per watt, but not all lower-spec 30w LED floodlights are as bright. Lights are measured in lumens, and higher lumens generally means a better LED.
What are the sizes of light bulbs?
Numbers in each code refer to the bulb’s diameter in one-eighths of an inch.
- A15 bulb: 15/8 = 1-7/8″ diameter.
- A19 bulb: 19/8 = 2-3/8″ diameter.
- A21 bulb: 21/8 = 2-5/8″ diameter.
- A25 bulb: 25/8 = 3-1/8″ diameter.
- G11 bulb: 11/8 = 1-3/8″ diameter.
- G14 bulb: 14/8 = 1-3/4″ diameter.
- G16/G50: 16/8 = 2″ diameter.
Does the shape of a light bulb matter?
The shape of the bulb doesn’t matter hence why you can buy many different shapes of bulbs, the common bulb shape was derived from the most easily produced shape from glass blowing.
What is the shape of a light bulb?
Similar to the shape, the base of the light bulb may also differ. The prefix “E” stems from the name “Edison” and the second is the diameter of the base measured in millimeters. No matter the style, the diameter of a light bulb is expressed in millimeters….A-Shape Light Bulb Base Types.
| Code | Base Type |
|---|---|
| GU24 | Twist and Lock |
How can I tell what light bulb I need?
2. Determine much light you need
- If you used to buy 100 watt bulbs, look for a bulb with 1600 lumens.
- If you used to buy 75 watt bulbs, look for a bulb with 1100 lumens.
- If you used to buy 60 watt bulbs, look for a bulb with 800 lumens.
- If you used to buy 40 watt bulbs, look for a bulb with 450 lumens.
How do I know what size my light bulb is?
Bulb sizing is very straightforward and simple, it is based on the diameter of the bulb at its widest point, measured in eighths of an inch (⅛”). For example, the designation “T12” indicates a tubular bulb that is 12 eighths of an inch (12/8”) in diameter (or 1 ½”).
What is standard light bulb shape?
The A-series light bulb is the “classic” glass light bulb shape that has been the most commonly used type for general lighting service (GLS) applications since the early 20th century. It has a pear-like shape and is typically fitted to either an Edison screw or a bayonet cap base.
How big is a BR 30 light bulb?
To find the diameter of the lamp, just divide the number after it by 8: e.g., the diameter of a BR 30 bulb is 30/8ths of an inch, or 3.75 inches in diameter. BR30 light bulbs deliver soft-edged, directional light and can typically be found in general household light fixtures, recessed can lighting, and/or track lighting.
What’s the difference between Par 30 and BR 30 LEDs?
Being namesakes of their halogen and incandescent counterparts, PAR 30 and BR (or R) 30 LEDs are the green solution to outdoor and indoor lighting. Though they bear some similarities, understanding their differences will help you make better decisions about which one of these bulbs works best for your needs.
What should the temperature of Your Light be?
Think, fireplace or candlelight quality (red and orange hues). A higher number indicates a cooler light like daylight and hospital lighting (whites and blues). Standard ranges are around 2700k on the warm side to over 5000k on the cool side.
What do the numbers mean on a light fixture?
A low number indicates warm light. Think, fireplace or candlelight quality (red and orange hues). A higher number indicates a cooler light like daylight and hospital lighting (whites and blues).
