For those who are using the Optronics MR16 Driving Lights and still want to extend the usefullness of your 6 volt battery system...

Here is a source for MR16 5W bulb. Contrary to what is stated in bicyclelighting.com, these bulbs / lamps are available in USA. You need not order these lamps from Europe.

The MR16 6V 5W is commonly used in exit / emergency lights. The MR16 10W 6V lamp (which was also available for the Thomas Betts Emergi-Lite) was de-listed sometimes ago. If you are able to find a new old stock on the 10W lamp in USA, please post.

Source for MR16 5W 6V
http://www.exitlightco.com/Merchant2...tegory_Code=LB

Price: Package of 2 for $14.00

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http://emergencylite.com/index.cfm also has these bulbs on page 5 of the lamps list. The part number is 11-256. The catalog also lists the 10w version on page 6 but the lamp is NOT AVAILABLE.

Price: $3.95 each but the company has a minimum handling charge of $6.00 + shipping.

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For those who have converted H3 base driving lights to bicycling use, the 6V 25W bulb is also widely available. Again.. bicyclelighting.com incorrectly states this bulb is hard to find.

The H3 bulb is commonly found in 6V 500,000 candlepower spot lights.. The spot lights are commonly available for $10.00 on sale.. Take out the 25W bulb and the 6v 4.5 or 5.0 ahr SLA battery, a wall wart charger, and throw away the spotlight if so choose.

Generally the H3 base driving lights have better reflectors (rectangluar refectors) than MR16 base system.

500,000 candlepower spotlights are commonly on sale at harborfreight.com

Much obliged.
Nick Lee
Sparks, NV 89431