Lamps
Optronics QC-777 $20
JC Whitney
Hampton Roads Pin Back track lamp $20 Home Depot
MR16 12V 12° bulb $3 each
Battery Space
Wiring
Remote switches $4
Battery Space
Dean’s connectors $4 Hobby Town
Polarized Speaker wire $10/spool Radio Shack
Mounts
Helmet mount $10
Battery Space
Handlebar mount $ 10 ea
Battery Space
Space Bar $20
Performance
1” aluminum tube (fits lights better ) for Spacebar $4 Local hardware store
Batteries
3.3 Ahr batteries $19 ea
Battery Space
Cage Rocket holder $10 ea
REI
Chargers
Maha C777 Plus II $70 (I have 3! But you can get cheaper ones at Battery Space)
Misc
Velcro – sticky back and regular - $10 Local hardware store
Misc nuts and bolts $5 Local hardware store
For my 3 lights with all the stuff except the chargers, I have $294 in it plus shipping and tax.
In all honesty, however, I had the batteries, the Spacebar, the battery holders, the wire, connectors, the bulbs and, finally, the chargers. I have another full set of lights that are based around Niterider lamp heads (similar to TrailRats) but juiced to 14.4V. They put out around 700 lumens per lamp which is very respectable. The Death Rays are just a fun experiment in how far over the top I can go
Here's another DIY called the
Pond Scum that's pretty slick too. Mine are a little more robust because they are metal housing. Price is about the same per lamp.