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DC bulbs ratings

Compiled by Jim Kennedy, Raleigh, NC, in December, 1995.

12 VOLT DC INCANDESCENT BULBS WITH SINGLE CONTACT BASE RATINGS OF BULBS OF INTEREST TO RVERS (Based on design specifications and tables and charts provided in GE and Sylvania catalogs and technical information) Operated at 12.8 Volts Bulb Design --------------------------------------- Number Volts Amps Watts MSCP Lumens Life --------- -------- ---- ----- ---- ------ -------- 67 & 1155 13.5 .57 7.3 3.3 41 9,000 89 & 90 13.0 .58 7.4 5.6 70 855 631 14.0 .60 7.7 4.4 55 2,900 97 13.5 .67 8.6 3.3 41 9,000 1003 12.8 .94 12.0 15.0 189 100/200* 105 12.8 1.00 12.8 12.0 151 500 93 12.8 1.04 13.3 15.0 189 700 1041R 1.04 13.3 1141 12.8 1.44 18.4 21.0 264 1,000 1156 12.8 2.10 26.9 32.0 402 1,200 ----------------------------------------------------------------------- Watts = Volts x Amps, is the power used by the bulb. MSCP = Mean Spherical Candle Power (Average visible light). Lumens = Alternative measure of light output (12.57 times MSCP). Life = Expected life in hours based on laboratory tests under constant, controlled conditions. This is not an accurate estimate of life under operating condition, but is useful for comparing the lifes of different bulbs. 12.8 Volts is approximate voltage of fully charged 12 volt battery. NOTE: The life expectancy of incandescent bulbs decreases greatly at the voltage increases. A bulb operated at 14 volts has about one fourth the life expectancy (and gives off about 50 percent more light) than the bulb operated at 12.5 volts. Information on other bulbs that are probably less useful to RVers is listed in a later table. *100/200 means that Sylvania rates the average life expectancy of their Number 1003 bulb as 100 hours and GE rates theirs as 200 hours. --------------------------------------------------------------------------- Sources of Information (available at no charge -- very interesting but more technical info than most people want): Sylvania Automotive, Miniature and Sealed Beam Lamp Catalog (Form #208) Sylvania Miniature Lighting Products Handbook (Form #204-R) From Sylvania Customer Service Phone 1-800-453-1506) GE Miniature & Sealed Beam Lamp Catalog From GE Lighting Systems Information Phone 1-800-286-5049, or GE Customer Service Phone 1-800-327-2080. ------------------------------------------------------------------------------- FLOURESCENT LIGHT BULBS OPERATED ON 12 VOLT DC (Based on data provided in Real Goods Solar Living Source Book, Osram Sylvania Products Catalog, and Isley's RV Center Catalog) Operated at 12 Volts Bulb Number ------------------------------------- Number of Bulbs Amps Watts MSCP Lumens Life --------- -------- ---- ----- ---- ------ ------ F8T5/CW 1 .9 8 32 400 7,500 F8T5/CW 2 1.6 16 70 880 7,500 F13T5/CW 1 1.3 13 65 820 7,500 F13T5/CW 2 1.9 26 137 1720 7,500 F15T8/CW 1 1.3 15 64 800 7,500 F15T8/CW 1 1.3 15 69 870 7,500 F15T8/CW 2 2.0 30 140 1760 7,500 F20T12/CW 1 1.6 20 99 1250 7,500 F20T12/CW 2 2.5 40 199 2500 7,500 7,500 F40T12/CW 1 2.9 40 251 3150 7,500 FC8T9/CW 1 1.9 22 88 1100 7,500 FC12T9/CW 1 2.6 32 151 1900 7,500 -------------------------------------------------------------------------- Amps = Total amps used by the bulb and ballast -- I think this is the total, but you have to be careful as the specs sometimes are for the bulb alone. Watts = Volts x Amps, is the power used by the bulb. MSCP = Mean Spherical Candle Power (Average visible light). Lumens = Alternative measure of light output (12.57 times MSCP). Life = Expected life in hours based on laboratory tests that may not be the expected life in actual use and are not directly comparable to the figures for incandescent bulbs. For fluorescent light bulbs, 12 Volts is given as operating voltage without further precision. According to Real Goods, fluorescent light bulbs often last about ten times longer than incandescent bulbs, and the following watts provide approximately equivalent light output: Incandescent Fluorescent ------------ ----------- 25 w 7 w 40 w 11 w 60 w 15 w 75 w 20 w 100 w 27 w ------------------------------------------------------------------------------- DESIGN SPECS OF 12 VOLT DC SINGLE CONTACT BULBS LISTED BY NUMBER Average Design Design Design Candela Life Bulb No. Volts Amps Watts (MSCP) (Hours) --------- ------- -------- ------- -------- -------- 67 13.5 .59 8.0 4 5000 89 & 90 13 .58 7.5 6 750 93 12.8 1.04 13.3 15 700 97 13.5 .69 9.3 4 5000 98 13 .62 8.1 6 800 105 12.8 1.00 12.8 12 500 199 12.8 2.25 28.8 32 1200 631 14 .63 8.8 6 1000 1003 12.8 .94 12.0 15 100/200 S/G 1041R 13.3 1073 12.8 1.80 23.0 32 200 1141 12.8 1.44 18.4 21 1000 1155 13.5 .59 8.0 4 5000 1156 12.8 2.10 26.9 32 1200 1195 12.5 3.00 37.5 50 300 1295 12.5 3.00 37.5 50 300 1383 13.0 1.54 20.0 - 300 1940 & 1944 14.0 3.57 50.0 75 300 2396 12.8 2.23 28.5 40 400 5007 12 .41 4.9 4 200 5008 12 .83 10.0 10 200 7309 12 2.90 34.8 43 100 7569 12 3.75 45.0 88 100 ----------------------------------------------------------------------- MISCELLANEOUS 12 VOLT DC SINGLE CONTACT BULBS Halogen 769 12.8 2.73 35 60 300 795 12.8 3.91 50 108 200 64170 12.8 3.91 50 108 200 Amber 1295NA 12.5 3.00 37.5 37 300 1156NA 12.8 2.10 26.9 24 1200 ---------------------------------------------------------------------------- NOTES: 100/200 S/G means Sylvania rates the average life expectancy of their bulb as 100 hours and GE rates theirs as 200 hours. --------------------------------------------------------------------------- Sources of Information (Available at no charge): Sylvania Automotive, Miniature and Sealed Beam Lamp Catalog (Form #208) Sylvania Miniature Lighting Products Handbook (Form #204-R) From Sylvania Customer Service Phone 1-800-453-1506) GE Miniature & Sealed Beam Lamp Catalog From GE Lighting Systems Information Phone 1-800-286-5049, or GE Customer Service Phone 1-800-327-2080, Fax 1-800-544-4850). ------------------------------------------------------------------------------- 12 VOLT DC BULBS WITH SINGLE CONTACT BASE COMPARISON OF 12.5 AND 14.0 VOLT OPERATION (Based on design specifications and tables and charts provided in GE and Sylvania catalogs and technical information) Operated at 12.5 Volts Operated at 14.0 Volts Bulb ---------------------------- ---------------------------- Number Amps Watts MSCP Life Amps Watts MSCP Life --------- ---- ----- ---- ------ ---- ----- ---- ------ 67 & 1155 .57 7.1 3.1 11,000 .60 8.4 4.6 3,100 89 & 90 .57 7.1 5.2 1,125 .60 8.5 7.9 300 631 .59 7.4 4.0 4,000 .63 8.8 6 1,000 97 .65 8.1 3.1 11,000 .70 9.8 4.6 3,100 105 .99 12.4 11.3 600 1.05 14.7 16.6 170 93 1.03 12.9 14.1 840 1.09 15.2 20.7 238 1141 1.43 17.8 19.7 1,200 1.51 21.1 29.0 340 1156 2.08 26.0 30.1 1,440 2.20 30.8 44.2 408 ----------------------------------------------------------------------------