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Glistenis 44mm Downlight Lens - 20° Beam Angle

£599
RRP £720
The RRP is the manufacturer's recommended retail price of the item.
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Description

The Glistenis is a 44mm diameter glass lens that narrows the beam angle of compatible downlight fittings to 20°, turning a general flood light into a focused accent light. The lens sits inside the downlight aperture and uses optical refraction to concentrate the light output into a tighter cone, increasing centre-beam intensity while reducing spill outside the target area.

Designed for accent and task lighting rather than general ambient use, the 20° beam suits spotlighting artwork, architectural details, retail displays, and directional task zones in kitchens or home offices. The lens fits Ideal Lux downlight housings with a 44mm lens holder diameter — check your downlight specification before ordering. Installation involves removing the existing diffuser or lens (if fitted) and clipping the Glistenis lens into the holder ring inside the downlight aperture.

The glass construction transmits over 90% of the light passing through it without yellowing or clouding over time, unlike some acrylic lenses which degrade under heat. The 44mm size is one of the standard aperture dimensions used across Ideal Lux's recessed downlight range, making the Glistenis compatible with multiple models in their catalogue. The transparent finish preserves the colour temperature of the bulb or LED module behind it, so a 3000K warm white source remains 3000K after passing through the lens.

Specification
Diameter (mm) 44
Warranty 5 Years
Frequently Asked

Which downlights is this lens compatible with?

The 44mm diameter fits Ideal Lux downlight housings with a matching 44mm lens holder. Check the specification of your existing downlight or contact us with the model number to confirm compatibility before ordering.

What's the difference between 20° and wider beam angles?

A 20° beam concentrates light into a narrow cone, increasing intensity at the centre but covering a smaller area. This suits accent lighting where you want a defined pool of light on a specific object. Wider beams (40°, 60°) spread light over a larger area with lower centre-beam intensity, better for general ambient lighting.

Does the lens reduce light output?

The glass transmits over 90% of the light passing through it, so the total lumen output drops by approximately 10%. However, the narrower beam angle increases centre-beam candela (intensity), so the lit area appears brighter even though total lumens are slightly lower.

Can the lens be used with LED and halogen downlights?

Yes, provided the downlight has a 44mm lens holder. The glass tolerates the heat from both LED and halogen sources without degrading.

Shipping & Returns

Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

To arrange a return, call us on 020 8149 5199 or use our contact page.

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Free delivery on orders over £99, in the UK and worldwide. Easy returns within 14 days, subject to our returns policy. Full manufacturer warranty included.

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    Description

    The Glistenis is a 44mm diameter glass lens that narrows the beam angle of compatible downlight fittings to 20°, turning a general flood light into a focused accent light. The lens sits inside the downlight aperture and uses optical refraction to concentrate the light output into a tighter cone, increasing centre-beam intensity while reducing spill outside the target area.

    Designed for accent and task lighting rather than general ambient use, the 20° beam suits spotlighting artwork, architectural details, retail displays, and directional task zones in kitchens or home offices. The lens fits Ideal Lux downlight housings with a 44mm lens holder diameter — check your downlight specification before ordering. Installation involves removing the existing diffuser or lens (if fitted) and clipping the Glistenis lens into the holder ring inside the downlight aperture.

    The glass construction transmits over 90% of the light passing through it without yellowing or clouding over time, unlike some acrylic lenses which degrade under heat. The 44mm size is one of the standard aperture dimensions used across Ideal Lux's recessed downlight range, making the Glistenis compatible with multiple models in their catalogue. The transparent finish preserves the colour temperature of the bulb or LED module behind it, so a 3000K warm white source remains 3000K after passing through the lens.

    Specification
    Diameter (mm) 44
    Warranty 5 Years
    Frequently Asked

    Which downlights is this lens compatible with?

    The 44mm diameter fits Ideal Lux downlight housings with a matching 44mm lens holder. Check the specification of your existing downlight or contact us with the model number to confirm compatibility before ordering.

    What's the difference between 20° and wider beam angles?

    A 20° beam concentrates light into a narrow cone, increasing intensity at the centre but covering a smaller area. This suits accent lighting where you want a defined pool of light on a specific object. Wider beams (40°, 60°) spread light over a larger area with lower centre-beam intensity, better for general ambient lighting.

    Does the lens reduce light output?

    The glass transmits over 90% of the light passing through it, so the total lumen output drops by approximately 10%. However, the narrower beam angle increases centre-beam candela (intensity), so the lit area appears brighter even though total lumens are slightly lower.

    Can the lens be used with LED and halogen downlights?

    Yes, provided the downlight has a 44mm lens holder. The glass tolerates the heat from both LED and halogen sources without degrading.

    Shipping & Returns

    Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

    Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

    To arrange a return, call us on 020 8149 5199 or use our contact page.