This was my first flashlight modding project, back in the fall of 2012. The “LarryK 14” is a spotlight mod named after it’s original creator. The idea is that a PAR 64 airplane landing bulb such as the 600 watt GE Q4559X will fit fairly easily into certain models of off the shelf spotlights. A small group of people on CPF have built these. A few of them are regulated, not unlike the one featured in this thread.
The bulb is rated for 100 hours at 28v, so it is already driven pretty hot at the rated voltage. The regulator board maintains 30 volts to the bulb which puts out some 15,000+ lumens. The battery pack is 5,000mah total, consisting of two 6s 5000mah zippy lipo’s in 12S1P (50.4v) configuration. The PWM makes the bulb BUZZZZ and sound really awesome when it’s running. It sounds like raw electrical power.
My original thread on CPF is here.
Inspirational and historical credits:
Original LarryK14 thread
Petrev’s Thor X10 Mod
BVH’s Regulated LarryK14
Parts used in this build: (prices include shipping)
-“Cyclops Thor X 10 Million Candle Power Spotlight.” Purchased used on Ebay. =$30
-GE Q4559X Par 64 Quartz Halogen Landing Lamp =$40
-JimmyM’s JM-PhD-X1 PWM Voltage Regulator =$85
–2x ZIPPY Flightmax 5000mAh 6S1P 20C LiPo’s =$100
–2x C&K Components DM22J12S205PQ Double-Pole Single-Throw Rocker Switch =$15
-Illuminated Momentary Pushbutton Switch, 22mm, Red LED, Stainless =$20
–2x FrSky Lipo Voltage Sensor FLVS-01 =$30
–2x 12” 6S JST-XH balance extension cable =$7
-Anderson Power Pole Connectors =$10
–12AWG silicone wire, 3 feet of black and red =$10
-OP/TECH USA 0901012 S.O.S. Shoulder Strap =$25
–2x Sunon 40mm 8200 RPM MagLev Fan (MB40201VX-G99) =$30
–2x Black 40mm Fan Grill =$5
–2x small plastic boxes (harvested lids for voltage display covers) =$9
-Misc. Hardware (nuts and bolts for the fans, split rings for strap, etc.) =$5
Total Cost of Materials: Roughly $421 USD
BEAMSHOTS: Sometimes I strap up and take my lights for a walk.
Distance: 962 feet [292 meters] to that barn.
SR-90 beamshots for comparison:(click to enlarge photos)
Distance: 830 feet [253 meters] to that house and outbuilding. The beam is aimed between the two structures but lights them both up.
Distance: 1300 feet [396 meters] to the railroad crossing.
Distance: 1150 feet [350 meters] to the pole. That’s a plowed field of brown dirt.