The Edwards 90 series AdaptaBeacon light duty strobe lights are designed to maximize the strobe tube brilliance. This is accomplished with a series of complementing fresnels that cause the dome to "fill" with light each time the strobe flashes. This design feature increases the AdaptaBeacon "on-time", thus improving viewer perception. The 90 Series' trigger and timing circuits are included as integral parts of the power supply. Replacement costs are reduced as it is necessary to replace only the strobe tube.