9/13/2005 - Audette Collection has been acquired by AC 911 Shop LLC and this site is being reconfigured to reflect the change. In the meantime it is being made available for reference purposes only. No purchases can be made here. Contact John Audette at ja@ac911shop.com to order.

AC High Performance Signal Bulb Kit - Technical Specs

 

Increased Illumination

Here’s the math supporting the 45% gain in brightness claim...

Standard bulbs
- single filament: 460 lumens
- double filament: 440/35

AC High performance bulbs
- single filament: 677 lumens = +47%
- double filament: 684/46 lumens = +55% / +31%

Current draw and heat generated

The AC high performance bulbs are 29w (single-filament) and 29w/8w (double-filament) at 12.8v. That equates to 32w/9w at 13.5 volts which is what they operate at. Standard "P21W" and "P21/5W" bulbs are rated 26.5w/6.6w at 13.5v.

At 13.5v in the bright mode we have 32w - 26.5w = 5.5 watts difference. In the dim mode we have 9w - 6.6w = 2.4 watts' difference. Which is not enough to cause a problem on the input side (wattage/wiring/switches) or on the output side (heat/lenses/housings).


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