Neon Light Signs
26 June 2010
Neon Light Signs
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 i408 b Locksmith Keys Display Lock Open Neon Light Sign $9.99 Time Remaining: 32m |
 US Seller Animated Led Neon Light Lighted OPEN Sign on off Switch Chain 19x10 $21.47 Time Remaining: 22d 1h 18m Buy It Now for only: $21.47 |
 v tm Name Personalized Custom I Love Series Neon Sign $9.99 Time Remaining: 35m |
 Animated LED Neon Light Open Sign Running Blue LED 730 $17.99 Time Remaining: 28d 8h 54m Buy It Now for only: $17.99 |
 i510 b Fine Cigars Cigar Shop Display Neon Light Sign $9.99 Time Remaining: 36m |
 led047 r Game Room LED Neon Light Sign $9.99 Time Remaining: 37m |
 US Seller Vertical Animated Led Neon light OPEN Sign on off Switch Chain 19x10 $24.97 Time Remaining: 1d 22h 49m Buy It Now for only: $24.97 |
 c142 b Coheed Cambria Neon Light Sign $9.99 Time Remaining: 37m |
 US SELLER ANIMATED LED NEON LIGHT LIGHTED OPEN SIGN 19X10 ON OFF SWITCH CHAIN $20.47 Time Remaining: 18d 1h 2m Buy It Now for only: $20.47 |
 BIG Da17 built touch car open Bar Neon light sign store display 1814 Real Neon $4.86 Time Remaining: 37m |
 i486 g Shamrock Irish Pub Bar Club NEW Neon Light Sign $9.99 Time Remaining: 37m |
 US Seller Animated Led Neon green light OPEN Sign on off Switch Chain 19x10 $28.97 Time Remaining: 2d 17h Buy It Now for only: $28.97 |
 i478 b OPEN Bar Pub Shop Cafe Club NEW Neon Light Sign $9.99 Time Remaining: 39m |
 Free Shipping Animated Neon LED Business Signs LED OPEN SIGN 19x10 On Sale $18.99 Time Remaining: 11d 17h 58m Buy It Now for only: $18.99 |
 c221 b 5FDP Five Finger Death Punch Neon Light Sign $9.99 Time Remaining: 43m |
 qe tm Name Personalized Custom Man Cave Hockey Bar Beer Neon Sign $9.99 Time Remaining: 44m |
 New Color LED Programmable Scrolling Message Display Sign 26x4 FREE SHIPPING $136.00 Time Remaining: 6d 9h 40m Buy It Now for only: $136.00 |
 BIG Da16 fire ball beer open Bar Neon light sign store display 1814 Real Neon $4.86 Time Remaining: 47m |
 Animated LED Neon Light Open Sign Classic Look 732 $25.99 Time Remaining: 29d 4h 13m Buy It Now for only: $25.99 |
 i468 b Jazz Bar Music Live Pub Club NEW Neon Light Sign $9.99 Time Remaining: 47m |
 b440 b Fire Fighter Ladder AXE Helmet Neon Light Sign $9.99 Time Remaining: 51m |
 NEW Animated LED Neon Business LED OPEN Sign with Motion ON OFF Switch 19 x 10 $18.98 Time Remaining: 9d 2h 8m Buy It Now for only: $18.98 |
 i496 b OPEN Pizza Display Cafe NEW NR Neon Light Sign $9.99 Time Remaining: 53m |
 Animated LED Neon Light Open Sign Running Blue LED 730 $7.99 Time Remaining: 28d 19h 36m Buy It Now for only: $7.99 |
 d129 g Arctic Cat Snowmobiles Logo Neon Light Sign $9.99 Time Remaining: 57m |
 zh14 cigars beer bar open Bar Neon light sign store display 1511 Real Neon $4.86 Time Remaining: 57m |
 US Seller Animated Led Neon light OPEN Sign on off Switch Chain 19x10 $36.97 Time Remaining: 2d 4h 39m Buy It Now for only: $36.97 |
 led054 b VIP Lounge LED Neon Light Sign Whiteboard $9.99 Time Remaining: 57m |
 VERTICAL LED NEON LIGHT LIGHTED OPEN SIGN 19X10 ON OFF SWITCH CHAIN BEST VALUE $24.95 Time Remaining: 28d 12h 10m Buy It Now for only: $24.95 |
 c107 b Slipknot Band Logo Rock n Roll Neon Light Sign $9.99 Time Remaining: 1h 1m |
 led040 r Cocktails Bar LED Neon Light Sign Whiteboard $9.99 Time Remaining: 1h 2m |
 ON OFF button LED OPEN SIGN ANIMATED NEON LIGHT19X10 SWITCH CHAIN RUNNING ATM $23.95 Time Remaining: 23d 9h 9m Buy It Now for only: $23.95 |
 vb tm Name Personalized Custom American Bulldog Dog House Home Neon Sign $9.99 Time Remaining: 1h 3m |
 Huge Neon Open sign real hand blown glass window or wall encased in Plastic $94.00 Time Remaining: 11d 1h 19m Buy It Now for only: $94.00 |
 zh31 121 club beer bar open Neon light sign store display 1511 Real Neon $4.86 Time Remaining: 1h 7m |
 c193 b Armin Van buuren Neon Light Sign $9.99 Time Remaining: 1h 8m |
 Name Personalized Custom Home Bar Beer Neon Light Sign $29.99 Time Remaining: 10d 5h 45m Buy It Now for only: $29.99 |
 qi tm Name Personalized Custom VIP Lounge Best Friends Only Bar Beer Neon Sign $9.99 Time Remaining: 1h 10m |
 Led Neon Open Light Lighted Sign On Animation Remote Control Switch US Seller $24.85 Time Remaining: 29d 17h 18m Buy It Now for only: $24.85 |
 i519 r Hot Dog Dogs Cafe Lounge Lure Neon Light Sign $9.99 Time Remaining: 1h 11m |
 X motocycle bike cafe beer open Bar Neon light sign store display 139 Real Neon $4.86 Time Remaining: 1h 17m |
 Super Bright LED Neon Light Hair Salon Nail Waxing 28 $28.99 Time Remaining: 25d 22h 39m Buy It Now for only: $28.99 |
 i543 b Frog Beer Bar Pub Display Lure Neon Light Sign $9.99 Time Remaining: 1h 20m |
 j122 b Bridal Shop Display Lure Neon Light Sign $28.99 Time Remaining: 29d 7h 48m Buy It Now for only: $28.99 |
 i536 b Script OPEN Glass Cocktails Bar Neon Light Sign $9.99 Time Remaining: 1h 21m |
 i555 b Tattoo Shop NEWEST Display Bar Neon Light Sign $9.99 Time Remaining: 1h 23m |
 i1014 r Women Female Girl Toilet Washroom Restroom Display Neon Light Sign $28.99 Time Remaining: 8d 10h 3m Buy It Now for only: $28.99 |
 i558 b Happy Hours Bar Pub OPEN Beer Neon Light Sign $9.99 Time Remaining: 1h 24m |
 NEW Animated LED Neon LED OPEN Sign with Motion ON OFF 005 Fast Ships from NY $19.95 Time Remaining: 4d 2h 34m Buy It Now for only: $19.95 |
 d179 b Cummins Equipment Tool Neon Light Sign $9.99 Time Remaining: 1h 27m |
 BIG Da79 motorcycle open Beer Bar Neon light sign store display 1814 Real Neon $4.86 Time Remaining: 1h 27m |
 Animated LED Neon Light Open Sign Running Green LED 733 $22.99 Time Remaining: 2d 3h 57m Buy It Now for only: $22.99 |
 led025 r ATM LED Neon Light Sign with Whiteboard $9.99 Time Remaining: 1h 31m |
 US SELLER ANIMATED BAR NEON LED OPEN SIGN 19X10 ON OFF SWITCH +HANGING CHAIN $24.99 Time Remaining: 17h 14m Buy It Now for only: $24.99 |
 i338 b GAME ROOM Displays Toys TV Neon Light Sign $9.99 Time Remaining: 1h 32m |
 c112 r Motley Crue Band Rock Bar Neon Light Sign $9.99 Time Remaining: 1h 33m |
 i1015 b Men Male Boy Toilet Washroom Restroom Display Neon Light Sign $28.99 Time Remaining: 8d 10h 3m Buy It Now for only: $28.99 |
 i480 b On Air Recording Studio NEW NR Neon Light Sign $9.99 Time Remaining: 1h 33m |
 NEW VERTICAL Animated LED Neon LED OPEN Sign with Motion ON OFF 21 X 10 287 $18.98 Time Remaining: 8d 1h 58m Buy It Now for only: $18.98 |
 c194 b Slayer Neon Light Sign $9.99 Time Remaining: 1h 36m |
 d145 b Volkswagen VW Car Logo Services Neon Light Sign $9.99 Time Remaining: 1h 37m |
 New One Line Semioutdoor Ultra Bright Red LED Programmable Scrolling Sign 38 $369.00 Time Remaining: 8d 9h 51m Buy It Now for only: $369.00 |
 c182 b The Strokes Neon Light Sign $9.99 Time Remaining: 1h 42m |
 NEW LED SIGN MASSAGE 24 x 12 x1 neon spa open $145.00 Time Remaining: 4d 19h 20m Buy It Now for only: $145.00 |
 d190 r Indian Motorcycle Services Logo Neon Light Sign $9.99 Time Remaining: 1h 43m |
 vc tm Name Personalized Custom Boston Terrier Dog House Home Neon Sign $9.99 Time Remaining: 1h 43m |
 Animated Motion LED Business Nails SIGN for Nail Beauty Shop Hair Salon 19 X10 $19.88 Time Remaining: 9d 3h Buy It Now for only: $19.88 |
 d212 b Triumph Go Your Own Way Neon Light Sign $9.99 Time Remaining: 1h 44m |
 Animated LED Neon Light Open Sign Oval Led Sign S730 $22.99 Time Remaining: 25d 3h 59m Buy It Now for only: $22.99 |
 qs tm Name Personalized Custom Beer Ale Vintage Bar Cold Beer Neon Light Sign $9.99 Time Remaining: 1h 49m |
 led028 r Bar Beer Cup LED Neon Light Sign Whiteboard $9.99 Time Remaining: 1h 50m |
 Animated LED Coffee Sign Mug Animation On Off NEW 747 $23.99 Time Remaining: 1d 7h 46m Buy It Now for only: $23.99 |
 VIENNA BEEF HOT DOG Hanging Diner and Restaurant Neon Light Food Stand Sign Wall $199.99 (1 Bid) Time Remaining: 1h 50m |
 15x11 Yuengling Logo Beer Bar Pub Store Display Light Neon Sign N65 $78.99 Time Remaining: 19d 18h 47m Buy It Now for only: $78.99 |
 i565 b ATM Inside Display Lure NEW Neon Light Sign $9.99 Time Remaining: 1h 51m |
 e003 b XBox 360 Neon Light Signs $9.99 Time Remaining: 1h 57m |
 Animated LED Neon Light Open Sign Deluxe Welcome Open $22.99 Time Remaining: 23d 6h 29m Buy It Now for only: $22.99 |
 Modelo Especial Ceiling Mount Curved Electric Commercial Bar Light Sign 195H $119.99 Time Remaining: 1h 58m |
 j335 b COYOTE HOWLING Home Decor Animal Neon Light Sign $28.99 Time Remaining: 29d 7h 13m Buy It Now for only: $28.99 |
 Neon Tech Commercial Backbar Cerveza MODELO ESPECIAL Electric Acrylic Light Sign $87.99 Time Remaining: 1h 58m |
 Neon Tech Commercial Backbar PACIFICO SAILFISH Electric Acrylic Led Light Sign $94.99 Time Remaining: 1h 58m |
 ta tm Name Personalized Custom Home Sweet Home Scottie Peace Love Neon Sign $29.99 Time Remaining: 2d 5h 54m Buy It Now for only: $29.99 |
 c168 g Wicked The Musical Bar Neon Light Sign $9.99 Time Remaining: 2h 6m |
 i412 b DVD Rental Shop Store Neon Light Sign $28.99 Time Remaining: 29d 9h 55m Buy It Now for only: $28.99 |
 d133 b International Harvester Tractor Neon Light Sign $9.99 Time Remaining: 2h 8m |
Explain the energy transitions in a neon light, glass tube to produce light.?
How would I calculate the energy difference between any two of the energy levels in a neon atom?
If the neon gas is only 25% efficient at converting electric energy to light energy. estimate the total number of photons emitted by this sign in one second.
You pretty much have to look up the energy values of the different energy levels in neon, since they're very difficult to calculate. The "ground state" for neon is E1, E2 is the first excited state, and E3 is the second excited state. E2 is 18.7 eV (electron-volts) above the ground state, and E3 is 20.66 eV above the ground state.
When an electron transitions from a higher energy state to a lower state, it releases a photon with an energy equal to the difference in the two energy levels. So when an electron in a neon atom drops from the E3 state to the E2 state, the released photon has an energy of 20.66 eV -18.7 eV = 1.96 eV. This 1.96 eV photon has a wavelength of 632.8 nanometers, which is red. This is why excited neon tubes glow red. An electron transitioning from E3 to E1 would release a photon with 20.66 eV, which is not visible light - it's ultraviolet.
As for the efficiency, assume that you're giving the tube 100 Watts of power. Since the tube is only 25% efficient in producing visible light, that means that there must be 25 W of visible light coming out of the tube. 25 W is 25 joules per second, and 1 Joule is 6.24 X 10^18 eV.
So you need 25 times 6.24X10^18 electron volts, or 1.56 X 10^20 electron-volts per second. Since each red photon has 1.96 eV, that means you need 1.56X10^20 ev per second divided by 1.96 eV per photon = 7.96 photons per second to get 25 W of visible light energy.
