Replacing Old LEDs

I believe that all these LEDs are on ISA or EISA cards, circa 1987. Let me be more specific now that I have gone to radio shack. In 5mm red LEDs they have 12volt, 2.6v, 1.8v Here are web pages: http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&product%5Fid=… 09 ? 5mm Red LED $1.29 ?????Brand: RadioShack Catalog #: 276-209 ?????Model: 276-209 Availability On-line: In-stock In Store: Check availability Phone: In-stock 1-800-THE-SHACK (1-800-843-7422) (Pricing and availability may vary outside the contiguous 48 United States.) Typical MCD is 1.5. Typical wavelength is 697mm. Size is T-1-3/4 or 5mm. Red lens color. Viewing angle is 36?. 10mA (max). Typical Voltage is 2.0, with a maximum voltage of 12.0V. Comes as package of 1. http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&product%5Fid=… 41 5mm Red LED $1.29 ?????Brand: RadioShack Catalog #: 276-041 ?????Model: 276-041 Availability On-line: In-stock In Store: Check availability Phone: In-stock 1-800-THE-SHACK (1-800-843-7422) (Pricing and availability may vary outside the contiguous 48 United States.) Typical MCD is 10. Typical wavelength is 700mm. Size is T1 3/4 or 5mm. Red lens color. Viewing angle is 30?. Current is 28mA (max). Typical Voltage is 2.25, with a maximum voltage of 2.6V. Comes as package of 2. 276-330 which is 1.8v does not seem to have web page available. Should I just put in the 12v one? And turn around if I get it wrong? or use jumpers to test it before soldering? Bradley